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75-20-7

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75-20-7 Usage

Description

Different sources of media describe the Description of 75-20-7 differently. You can refer to the following data:
1. Calcium carbide (molecule formula: CaC2), is a kind of important chemical raw materials produced from the chemical processing of limestone. In 1892, H. Maysan (French) and H. Wilson (United state) simultaneously developed a calcium carbide production approach based on furnace Reduction. The United State had successfully achieved industrial production in 1895. The property of calcium carbide is related to its purity. Its industrial product is mostly the mixture of calcium carbide and calcium oxide, and also contains trace amounts of sulfur, phosphorus, nitrogen and other impurities. With the increasing content of impurities, it color exhibits gray, brown to black. The melting point and electrical conductivity both decrease with the decrease of the purity. The purity of its industrial product is usually 80% with m.p. being 1800~2000 °C. At room temperature, it does not react with air, but it can have oxidation reaction at above 350 ℃, and have reaction with nitrogen at 600~700 ℃ to generate calcium cyanamide. Calcium carbide, when coming across with water or steam, generates acetylene and release a large amount of heating. CaC2 + 2H2O─ → C2H2 + Ca (OH) 2 + 125185.32J, 1kg of pure calcium carbide can produce 366 L of acetylene 366l (15 ℃, 0.1MPa). Thereby, for its storage: calcium carbide should be strictly kept away from water. It is usually packed in a sealed iron container, and sometimes stored in a dry warehouse being filled with nitrogen if necessary.
2. Calcium carbide,is a binary salt. It is a grayish-black hard solid that reacts with water to produce acetylene gas, a solid corrosive that is calcium hydroxide, and release heat. Acetylene gas is manufactured by reacting calcium carbide with water. Because acetylene is so unstable, it is not shipped in bulk quantities. Calcium carbide is shipped to acetylene-generating plants where it is reacted with water in a controlled reaction. After the reaction process, the acetylene gas is placed into specially designed containers with a honeycombed mesh inside for shipment and use. It is dissolved in acetone for stability. Calcium carbide has a specific gravity of 2.22, which is heavier than water. The four-digit UN identification number for calcium carbide is 1402. The NFPA 704 designation is health 3, flammability 3, and reactivity 2. The white section at the bottom of the diamond contains a W with a slash through it, indicating water reactivity. It is shipped in metal cans, drums, and specially designed covered bins on railcars and trucks. When shipped and stored, it should be kept in a cool, dry place. Primary uses are in the generation of acetylene gas for welding, vinyl acetate monomer, and as a reducing agent.

Uses

Different sources of media describe the Uses of 75-20-7 differently. You can refer to the following data:
1. ▼ ▲ Industry Applications Benefit Chemical manufacture Production of acetylene gas Raw materials,CaC2 + 2 H2O → C2H2 + Ca(OH)2 Production of calcium cyanamide Raw materials, CaC2 + N2 → CaCN2 + C Production of various acetylene derivatives Source of acetylene gas Production of calcium hydroxide Raw materials, CaC2 + 2 H2O → C2H2 + Ca(OH)2 Steel production The desulfurisation of iron (pig iron, cast iron and steel) Desulfurization agent As a fuel in steelmaking Extend the scrap ratio to liquid iron Ladle?treatment facilities A powerful deoxidizer Mining, automobiles and street lighting Carbide lamps React with water to make acetylene gas, which can burn to glow Fruit Artificial ripening fruit Source of acetylene gas Signal flares Floating, self-igniting naval signal flares Used together with calcium phosphide Cylinder gas Metal fabrication and construction Source of acetylene gas Experiment teaching Teaching reagent Experiment reagent
2. Calcium carbide (CaC2) has a garlic-like odor and reacts with water to form acetylene gas plus calcium hydroxide and heat. In the past, it was used in miners’ lamps to continuously produce a small acetylene flame to provide some illumination in coal mines.
3. Calcium carbide is used as a desulfurizer, dehydrant of steel, fuel in steel making, powerful deoxidizer and as a source of acetylene gas. It is used as a starting material for the preparation of calcium cyanamide, ethylene, chloroprene rubber, acetic acid, dicyandiamide and cyanide acetate. It is used in carbide lamps, toy cannons such as the big-bang cannon and bamboo cannon. It is associated with calcium phosphide and used in floating, self-igniting naval signal flares. Further, it is involved in the reduction of copper sulfide to metallic copper.
4. Calcium carbide is the most relevant carbide industrially because of its important role as the basis of acetylene industry. In locations where there is shortage of petroleum, Calcium Carbide is used as the starting material for the production of acetylene (1 kg of carbide yields ~300 liters acetylene), which, in turn, can be used as a building block for a range of organic chemicals (e.g. vinyl acetate, acetaldehyde and acetic acid). In some locations, acetylene is also used to produce vinyl chloride, the raw material for the production of PVC. A less important use of Calcium Carbide is related to the ferilizers industry. It reacts with nitrogen to form calcium cyanamide, which is the starting material for the production of cyanamide (CH2N2). Cyanamide is a common agricultural product used to stimulate early foliation. Calcium Carbide can also be employed as desulfurizing agent for producing low-sulfur carbon steel. Also, it is used as a reducing agent to produce metals from their salts, e.g., for direct reduction of copper sulfide to metallic copper.

Reaction with water

Calcium carbide will immediately have reaction upon coming across with water, generating acetylene and calcium hydroxide, which is the approach of industrial preparation of acetylene (carbide method), the reaction equation is: CaC2 + 2H2O = C2H2 + Ca (OH) 2. Since the impurity of calcium carbide, the generated acetylene gas is usually mixed with a small amount of hydrogen sulfide, phosphine gas and other contaminants, so there is a bad smell. Calcium carbide is produced from the lime and coke in an electric furnace at a high temperature of 3000 ℃: 3C + CaO = CaC2 + CO. Upon the laboratory preparation of acetylene, owing to the reaction between calcium carbide and water is very fierce, we can apply saturated brine to substitute water so that a pure and smooth airflow of acetylene can be obtained. Calcium carbide won’t have reaction with sodium chloride.

Production method

Electric furnace reduction method is the only method for industrial production of calcium carbide at present. Put calcium oxide and coke for reduction reaction at 2000~2200 ℃: CaO + 3C─ → CaC2 + CO-480644.64J, the resulting molten calcium carbide flow into the receiver tank from the bottom of the reactor, and we obtain the final product after cooling. Calcium carbide production belongs to high temperature operation with relative large amount dust being produced and consuming a large amount of electrical energy. In 1980s, the production of per ton of calcium carbide consumes industrial power of about 10~11GJ. In order to reduce the power consumption, people mostly apply large-scale and closed calcium carbide furnace to reduce heat loss and also do good to the recycling of carbon monoxide.

Chemical Properties

grey or black solid with a garlic-like odour

Physical properties

Grayish-black orthorhombic crystal; density 2.22 g/cm3; melts at 2,200°C; reacts with water.

Preparation

Calcium carbide (CaC2) is manufactured by heating a lime and carbon mixture to 2000 to 2100°C (3632 to 3812°F) in an electric arc furnace. At those temperatures, the lime is reduced by carbon to calcium carbide and carbon monoxide (CO), according to the following reaction: CaO + 3C → CaC2 + CO Lime for the reaction is usually made by calcining limestone in a kiln at the plant site. The sources of carbon for the reaction are petroleum coke, metallurgical coke, and anthracite coal. Because impurities in the furnace charge remain in the calcium carbide product, the lime should contain no more than 0.5 percent each of magnesium oxide, aluminum oxide, and iron oxide, and 0.004 percent phosphorus. Also, the coke charge should be low in ash and sulfur. Analyses indicate that 0.2 to 1.0 percent ash and 5 to 6 percent sulfur are typical in petroleum coke. About 991 kilograms (kg) (2,185 pounds [lb]) of lime, 683 kg (1,506 lb) of coke, and 17 to 20 kg (37 to 44 lb) of electrode paste are required to produce 1 megagram (Mg) (2,205 lb) of calcium carbide.

Reactions

Calcium carbide is grayish-black solid, reacts with water yielding acetylene gas and calcium hydroxide, formed at electric furnace temperature from calcium oxide and carbon.

General Description

Grayish-black irregular lump solid. Used to make acetylene and in steel manufacture.

Air & Water Reactions

Reacts rapidly with water to generate the flammable gas acetylene and the base calcium hydroxide. Enough heat may be generated to ignite the gas [Jones, G.W. BM Report Invest. 3755 1944].

Reactivity Profile

Calcium carbide is a reducing agent. May react vigorously with oxidizing materials. The powdered mixture of the acetylide and iron oxide and iron chloride burns violently upon ignition, producing molten iron. Calcium carbide incandesces with chlorine, bromine, or iodine at 245, 350, or 305°C., respectively, [Mellor, 1946, Vol. 5, 862]. The carbide burns incandescently when mixed and heated with lead difluoride, magnesium, hydrogen chloride, and tin (II) chloride, [Mellor, 1946, 1940, 1946, and 1941], respectively. Interaction of Calcium carbide with methanol to give calcium methoxide is vigorous , but subject to an induction period of variable length. Once reaction starts, evolution of acetylene gas is very rapid, unpublished observations [Bretherick 1995]. Mixing Calcium carbide with silver nitrate solutions forms silver acetylide, a highly sensitive explosive. Copper salt solutions would behave similarly, [Photogr. Sci. Eng., 1966, 10, 334]. The mixture of Calcium carbide and sodium peroxide is explosive, as is Calcium carbide and perchloryl fluoride as gases at 100-300°C.

Hazard

Forms flammable and explosive gas and corrosive solid with moisture.

Health Hazard

It is a corrosive solid. Because it is highlywater-reactive, skin contact can cause burn.

Fire Hazard

Behavior in Fire: If wet by water, highly flammable acetylene gas is formed.

Safety Profile

Reaction on contact with moisture forms explosive acetylene gas. Flammable on contact with moisture, acid or acid fumes; evolves heat or flammable vapors. Moderate explosion hazard. Incandescent reaction with Cl2 (245℃), Brz (350℃), IS (305℃), HCl gas + heat, PbF2, Mg + heat. Incompatible with Se, (KOH + Ch), AgNO3, Na2O2, SnCl2, S, water. Mixtures with iron(IⅡ) chloride, iron(IⅡ) oxide, tin(Ⅱ) chloride are easily ignited and burn fiercely. Vigorous reaction with methanol after an induction period. Addttion to silver nitrate solutions precipitates the dangerously explosive silver acetylide. Copper salt solutions behave similarly. See also CALCIUM HYDROXIDE and ACETYLENE.

Check Digit Verification of cas no

The CAS Registry Mumber 75-20-7 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75-20:
(4*7)+(3*5)+(2*2)+(1*0)=47
47 % 10 = 7
So 75-20-7 is a valid CAS Registry Number.
InChI:InChI=1/C2H2.Ca/c1-2;/h1-2H;/q;+2

75-20-7 Well-known Company Product Price

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  • (Code)Product description
  • CAS number
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  • Alfa Aesar

  • (14308)  Calcium carbide   

  • 75-20-7

  • 1kg

  • 446.0CNY

  • Detail
  • Alfa Aesar

  • (14308)  Calcium carbide   

  • 75-20-7

  • *5x1kg

  • 2225.0CNY

  • Detail
  • Aldrich

  • (270296)  Calciumcarbide  pieces, thickness <10 mm , typically, technical grade, ~80%

  • 75-20-7

  • 270296-500G

  • 492.57CNY

  • Detail
  • Aldrich

  • (270296)  Calciumcarbide  pieces, thickness <10 mm , typically, technical grade, ~80%

  • 75-20-7

  • 270296-2KG

  • 1,023.75CNY

  • Detail
  • Aldrich

  • (21039)  Calciumcarbide  granulated, technical, ≥75% (gas-volumetric)

  • 75-20-7

  • 21039-100G-F

  • 580.32CNY

  • Detail
  • Aldrich

  • (21039)  Calciumcarbide  granulated, technical, ≥75% (gas-volumetric)

  • 75-20-7

  • 21039-1KG-F

  • 1,123.20CNY

  • Detail

75-20-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name Calcium carbide

1.2 Other means of identification

Product number -
Other names calciumdicarbide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Intermediates
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:75-20-7 SDS

75-20-7Synthetic route

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With biochars (apricot shell, willow or pine wood etc.) In neat (no solvent) Kinetics; reaction at 1650-1750 °C; detd. by XRD;97%
With sugar coal In neat (no solvent) heating CaO with sugar coal (1:3) at 1700°C, pressure about 100 Torr, during less 1 hour;; about 97% CaC2;;
With pyrographite In neat (no solvent) Electric Arc; from mixture of CaO and char coal powder; carbon electrodes, 12-14 A, 10-15 min; special app. described;;
calcium hydride
7789-78-8

calcium hydride

lithium
7439-93-2

lithium

pyrographite
7440-44-0

pyrographite

A

2Ca(2+)*Li(1+)*C3(4-)*H(1-)=Ca2LiC3H

2Ca(2+)*Li(1+)*C3(4-)*H(1-)=Ca2LiC3H

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In further solvent(s) acetylene carbon black reacted with CaCH2 in Ca/Li flux; sealed ampules heated to 1323 K in 2 h and kept at this temp. for 2 h; cooled to 1073 K in 24 h, cooled to 773 K in 108 h, centrifuged; elem. anal.;A 70%
B n/a
calcium chloride

calcium chloride

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With sodium In neat (no solvent) mixture of CaCl2, retort carbon and metallic Na in Fe crucible; 0.5 h at light red heat;;50%
With retort carbon; Na In neat (no solvent) mixture of CaCl2, retort carbon and metallic Na in Fe crucible; 0.5 h at light red heat;;50%
calcium cyanamide
156-62-7

calcium cyanamide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With calcium sulfate at 1130 - 1250℃; im Vakuum; isomer(ic) II;
at 1100 - 1150℃; isomer(ic) III;
at 1130℃; zuletzt bei 1250-1300grad; isomer(ic) IV;
CaCN2

CaCN2

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
isomer(ic) IV;
carbon

carbon

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With hydrogen; calcium at 1150 - 1250℃;
With argon; calcium at 1150 - 1250℃;
carbon

carbon

CaO

CaO

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
isomer(ic) II;
sugar-coal

sugar-coal

calcium

calcium

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With nitrogen at 1050 - 1300℃; isomer(ic) II;
at 1050 - 1300℃; isomer(ic) III;
sugar-coal

sugar-coal

CaO

CaO

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With calcium sulfate at 1700℃; im Hochvakuum; isomer(ic) II;
at 1700℃; im Hochvakuum, dann in Stickstoff-Atmosphaere unter 30-120 mm bei 1250grad; isomer(ic) III;
at 1700℃; im Hochvakuum; isomer(ic) IV;
im elektrischen Ofen; isomer(ic) IV;
silicon carbide

silicon carbide

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) byproducts: Ca-silicide; at 1690-1740°C;;
In neat (no solvent) byproducts: Ca-silicide; at 1690-1740°C;;
In neat (no solvent)
aluminium carbide
1299-86-1

aluminium carbide

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

aluminium
7429-90-5

aluminium

Conditions
ConditionsYield
at >845°C;
at >845°C;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium oxide

calcium oxide

Conditions
ConditionsYield
With carbon dioxide
With CO2 by fast heating;
With CO2
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

C

calcium oxide

calcium oxide

Conditions
ConditionsYield
With CO2 by slow heating;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium chloride

calcium chloride

Conditions
ConditionsYield
With tetrachloromethane burning in the presence of silica gel with excess of Ca after ignition with a mixture of CaSi2+KNO3;
With CCl4 burning in the presence of silica gel with excess of Ca after ignition with a mixture of CaSi2+KNO3;
calcium
7440-70-2

calcium

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With soot at red heat;
In neat (no solvent) liquid, heated Ca was treated with organic compounds;;
With char coal In neat (no solvent) burning heated pieces of Ca on char coal;;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
With CO at read heat;
With methane over dark red heat;
calcium benzylate

calcium benzylate

calcium
7440-70-2

calcium

A

calcium hydride
7789-78-8

calcium hydride

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
at dark red heat;
potassium thioacyanate
333-20-0

potassium thioacyanate

calcium
7440-70-2

calcium

A

calcium(II) sulfide

calcium(II) sulfide

B

calcium nitride

calcium nitride

C

calcium carbide
75-20-7

calcium carbide

D

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
at 300-400°C and 25 Torr with 50% conversion of Ca;
at 300-400°C and 25 Torr with 50% conversion of Ca;
ethene
74-85-1

ethene

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
over dark red heat;
hexachlorobenzene
118-74-1

hexachlorobenzene

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium chloride

calcium chloride

Conditions
ConditionsYield
explosion after ignition with Mg;
explosion after ignition with Mg;
calcium
7440-70-2

calcium

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
over red heat;
In neat (no solvent) 1.5 h heating in closed Fe crucible at 1150-1200°C;; 94% CaC2, 2% free carbon, small amts. of CaO and up to 2% impurities;;
In neat (no solvent) C (calcinated soot or calcinated, powdered petroleum coke); Fe crucible in resistance furnace under Ar: 825 Torr, 10-30 min, 1250°C and 3-6 Torr, 15 min, 1150°C; keep under N2 and P2O5 in desiccator;; melting at 2200°C, 750 Torr under Ar; product contains 90-93% CaC2, 2-4% graphite, up to 3% CaO and about 2% Fe and Al;;
calcium carbonate

calcium carbonate

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With hydrogen In neat (no solvent) use of carbon and CaO from lime through reduction with H2;;
With aluminium In neat (no solvent) Electric Arc; under exclusion of air;;
With Sucrose In neat (no solvent) calcination;;
pyrographite
7440-44-0

pyrographite

calcium carbonate

calcium carbonate

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) byproducts: CaO, CO, CO2; Electric Arc; under heating, molar ratio carbonate:carbon=1:0.3, under Ar;
In neat (no solvent) description of dust control;;
With aluminum oxide In neat (no solvent) byproducts: Al; conducting the process; modification of pederson process: CaC2 as intermediate;;
ethene
74-85-1

ethene

calcium
7440-70-2

calcium

A

calcium hydride
7789-78-8

calcium hydride

B

calcium carbide
75-20-7

calcium carbide

C

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
In neat (no solvent) dark red heat; crust of CaC2, C and CaH2 inhibit reaction;;
In neat (no solvent) dark red heat; crust of CaC2, C and CaH2 inhibit reaction;;
calcium arsenide

calcium arsenide

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) at very high temp.;;
calcium(II) sulfide

calcium(II) sulfide

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) carbon forms in an electric furnace CaC2;;
diamond

diamond

calcium oxide

calcium oxide

A

carbon monoxide
201230-82-2

carbon monoxide

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) enthalpy of reaction given;;
methane
34557-54-5

methane

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) heating with methane;;
pyrographite
7440-44-0

pyrographite

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) in electrical furnace at 500 - 1500°C;;
With carbon dioxide; carbon monoxide; nitrogen In neat (no solvent) byproducts: NO; reaction with CO2 from lime;;
With silica gel; iron In neat (no solvent) byproducts: FeSi;
calcium carbide
75-20-7

calcium carbide

acetylene
74-86-2

acetylene

Conditions
ConditionsYield
With water Hydrolysis;100%
With water In water decompn.;;
With hydrogen In neat (no solvent) byproducts: Ca; at 2275°C pressure of H2 1 atm;;
4-hydroxybenzaldehyde 4-methylbenzenesulfonate ester
24962-55-8

4-hydroxybenzaldehyde 4-methylbenzenesulfonate ester

calcium carbide
75-20-7

calcium carbide

4,4'-(ethyne-1,2-diyl)bis(4,1-phenylene) bis(4-methylbenzenesulfonate)
1338725-51-1

4,4'-(ethyne-1,2-diyl)bis(4,1-phenylene) bis(4-methylbenzenesulfonate)

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99.4%
2-Iodothiophene
3437-95-4

2-Iodothiophene

calcium carbide
75-20-7

calcium carbide

1,2-di(thiophen-2-yl)ethyne
23975-15-7

1,2-di(thiophen-2-yl)ethyne

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Inert atmosphere;
4-Iodoacetophenone
13329-40-3

4-Iodoacetophenone

calcium carbide
75-20-7

calcium carbide

1,1'-[ethyne-1,2-diylbis(4,1-phenylene)]diethanone
29619-42-9

1,1'-[ethyne-1,2-diylbis(4,1-phenylene)]diethanone

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
3-Iodotoluene
625-95-6

3-Iodotoluene

calcium carbide
75-20-7

calcium carbide

bis(3-methylphenyl)acetylene
2765-16-4

bis(3-methylphenyl)acetylene

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In N,N-dimethyl-formamide at 60℃; for 24h;
4-tolyl iodide
624-31-7

4-tolyl iodide

calcium carbide
75-20-7

calcium carbide

1,2-bis(4-methylphenyl)acetylene
2789-88-0

1,2-bis(4-methylphenyl)acetylene

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In tetrahydrofuran at 55℃; for 20h; Sonogashira Cross-Coupling;95%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In N,N-dimethyl-formamide at 60℃; for 24h;
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Inert atmosphere;
1-iodo-4-(methoxymethyl)benzene
91912-54-8

1-iodo-4-(methoxymethyl)benzene

calcium carbide
75-20-7

calcium carbide

1,2-bis(4-(methoxymethyl)phenyl)ethyne

1,2-bis(4-(methoxymethyl)phenyl)ethyne

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
calcium carbide
75-20-7

calcium carbide

N-2-methylphenyl-3-phenylcarbohydrazonoyl chloride
25939-09-7

N-2-methylphenyl-3-phenylcarbohydrazonoyl chloride

3-phenyl-1-(2-methylphenyl)-1H-pyrazole

3-phenyl-1-(2-methylphenyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-(3-tolyl)benzohydrazonoyl chloride

N-(3-tolyl)benzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-phenyl-1-(3-tolyl)-1H-pyrazole

3-phenyl-1-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole
1609032-02-1

3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Solvent; Sealed tube;99%
4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

4,5-dideutero-3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
3,4-dimethyl-N-phenylbenzohydrazonoyl chloride

3,4-dimethyl-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(3,4-dimethylphenyl)-1-phenyl-1H-pyrazole

3-(3,4-dimethylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3,5-dimethyl-N-phenylbenzohydrazonoyl chloride
25939-20-2

3,5-dimethyl-N-phenylbenzohydrazonoyl chloride

3-(3,5-dimethylphenyl)-1-phenyl-1H-pyrazole

3-(3,5-dimethylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-methoxy-N'-phenylbenzohydrazonoyl chloride
40277-63-2

4-methoxy-N'-phenylbenzohydrazonoyl chloride

3-(4-methoxy-phenyl)-1-phenyl-1H-pyrazole
33064-21-0

3-(4-methoxy-phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-methoxy-N'-phenylbenzohydrazonoyl chloride
40277-63-2

4-methoxy-N'-phenylbenzohydrazonoyl chloride

4,5-dideutero-3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

p-toluoyl chloride phenylhydrazone
25939-01-9

p-toluoyl chloride phenylhydrazone

3-(4-methylphenyl)-1-phenyl-1H-pyrazole
33064-20-9

3-(4-methylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3-methyl-N'-phenylbenzohydrazonoyl chloride
25939-10-0

3-methyl-N'-phenylbenzohydrazonoyl chloride

1-phenyl-3-(3-tolyl)-1H-pyrazole
895138-61-1

1-phenyl-3-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3-methyl-N'-phenylbenzohydrazonoyl chloride
25939-10-0

3-methyl-N'-phenylbenzohydrazonoyl chloride

4,5-dideutero-1-phenyl-3-(3-tolyl)-1H-pyrazole

4,5-dideutero-1-phenyl-3-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenylbenzohydrazonoyl chloride
15424-14-3

N-phenylbenzohydrazonoyl chloride

1,3-diphenyl-1H-pyrazole
4492-01-7

1,3-diphenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenylbenzohydrazonoyl chloride
15424-14-3

N-phenylbenzohydrazonoyl chloride

4,5-dideutero-1,3-diphenyl-1H-pyrazole

4,5-dideutero-1,3-diphenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-bromo-N-phenylbenzohydrazonoyl chloride
25939-12-2

4-bromo-N-phenylbenzohydrazonoyl chloride

3-(4-bromophenyl)-1-phenyl-1H-pyrazole
33064-18-5

3-(4-bromophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-bromo-N-phenylbenzohydrazonoyl chloride
25939-12-2

4-bromo-N-phenylbenzohydrazonoyl chloride

3-(4-bromophenyl)-4,5-dideutero-1-phenyl-1H-pyrazole

3-(4-bromophenyl)-4,5-dideutero-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenyl-p-chlorobenzohydrazonoyl chloride
36590-52-0

N-phenyl-p-chlorobenzohydrazonoyl chloride

3-(4-chlorophenyl)-1-phenyl-1H-pyrazole
33064-19-6

3-(4-chlorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

chloro(phenyl)methanone p-bromophenylhydrazone
41626-19-1

chloro(phenyl)methanone p-bromophenylhydrazone

1-(4-bromophenyl)-3-phenyl-1H-pyrazole

1-(4-bromophenyl)-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

chloro(phenyl)methanone p-bromophenylhydrazone
41626-19-1

chloro(phenyl)methanone p-bromophenylhydrazone

1-(4-bromophenyl)-4,5-dideutero-3-phenyl-1H-pyrazole

1-(4-bromophenyl)-4,5-dideutero-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3,4-dichloro-N-phenylbenzohydrazonoyl chloride
25938-99-2

3,4-dichloro-N-phenylbenzohydrazonoyl chloride

3-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole

3-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-(α-chlorobenzylidene)-N'-p-chlorophenylhydrazine
17359-82-9

N-(α-chlorobenzylidene)-N'-p-chlorophenylhydrazine

1-(4-chlorophenyl)-3-phenyl-1H-pyrazole
63637-57-0

1-(4-chlorophenyl)-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride
69660-02-2

N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride
69660-02-2

N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

4,5-dideutero-3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
2-(4-isobutylphenyl)-N-phenylpropanehydrazonoyl chloride

2-(4-isobutylphenyl)-N-phenylpropanehydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(1-(4-isobutylphenyl)ethyl)-1-phenyl-1H-pyrazole

3-(1-(4-isobutylphenyl)ethyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%

75-20-7Relevant articles and documents

Ca2LiC3H: A new complex carbide hydride phase grown in metal flux

Lang, David A.,Zaikina, Julia V.,Lovingood, Derek D.,Gedris, Thomas E.,Latturner, Susan E.

, p. 17523 - 17530 (2010)

The reaction of carbon and CaH2 in a calcium/lithium flux mixture produces crystals of the new compound Ca2LiC3H. This phase forms with a new structure type in tetragonal space group P4/mbm (a = 6.8236(1) A, c = 3.7518(1) A, Z = 2, R1 = 0.0151). This is a stuffed variant of the Cs2(NH2)N3 structure, containing hydride anions in octahedral sites; the structure determination by single-crystal X-ray diffraction surprisingly allowed the hydrogen to be detected. The Ca2LiC3H structure also features the rarely seen C34- carbide anion; the protolysis reaction of this compound with ammonium chloride produces C 3H4. The electronic properties of Ca2LiC 3H were studied by quantum-chemical calculations including band structure and electron localization function (ELF) analysis; the phase is a charge-balanced semiconductor with a calculated band gap of 0.48 eV. This is in agreement with 7Li, 13C, and 1H MAS NMR data, which show resonances in the ionic region instead of the Knight shifted region. ELF analysis of the theoretical nonhydrided Ca2LiC3 structure confirms the ability of these calculations to properly locate hydrides and supports the structural model based on X-ray diffraction data.

On the coexistence of tetragonal and monoclinic CaC2: Structural and spectroscopic studies on alkaline earth metal acetylides, MC2 (M = Ca, Sr, Ba)

Reckeweg, Olaf,Baumann, Andreas,Mayer, Hermann A.,Glaser, Jochen,Meyer, H. -Jürgen

, p. 1686 - 1692 (2008/10/08)

The alkaline earth acetylides CaC2, SrC2 and BaC2 can be considered to occur in three polymorphic structures each. The monoclinic low-temperature form, the tetragonal form, and the cubic high-temperature form. No deviation from axial symmetry is obtained for the C22- ions in the tetragonal structure determinations, as confirmed by X-ray single-crystal structures and 13C MAS NMR studies. The CaC2 samples prepared by us were always a mixture of monoclinic and tetragonal phase. Their Raman spectra exhibited two distinct C2 streching vibrations. Problems arising from the coexistence of these two phases for the interpretation of 13C MAS NMR spectra are discussed.

BEHAVIOUR OF METAL CARBONATES IN SPECTROSCOPIC ARC, I. PRELIMINARIES. ROLE OF INSTABILITY OF CARBONATES

Szabo, Z. L.,Bertalan, E.,Tatar, E.

, p. 193 - 208 (2007/10/02)

Seven kinds of metal carbonates of different stability were studied in a.c. polarized arc, in Ar atmosphere, on mixtures with carbon powder of a molar fraction of 0.3 metal carbonate.The higher the thermal stability of the carbonate, the lower quantities of carbon oxides, measured by gas analytical methods were produced in the arc.The less stable carbonates suffer simple thermal decomposition, while in the case of Li2CO3 and BaCO3, carbon powder have a direct reducing effect.Under the conditions of the arc a substantial volume of CO was formed too, mainly according to the equation CO2 + C = 2 CO.Of the less stable carbonates, unstable metal oxides were formed, giving rise to further oxidation reactions.In the case of several carbonates, carbide formation could also be proved by gas analytical methods.Processes proceeding in the arc, their place, the depth of the reaction zone, etc., could be calculated and followed on the basis of data measured.Model substances for further investigations were chosen on the bases of these experiences.

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