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1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

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  • 166773-08-6 Structure
  • Basic information

    1. Product Name: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene
    2. Synonyms: 2,4-DIHYDRO-2,4,5-TRIPHENYL-3H-1,2,4-TRIAZOL-3-YLIDENE;1,3,4-TRIPHENYL-4,5-DIHYDRO-1H-1,2,4-TRIAZOL-5-YLIDENE;1,3,4-TRIPHENYL-4,5-DIHYDRO-1H-TRIAZOL-5-YLIDENE;1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene,96%
    3. CAS NO:166773-08-6
    4. Molecular Formula: C20H15N3
    5. Molecular Weight: 297.35
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 166773-08-6.mol
  • Chemical Properties

    1. Melting Point: 150 °C
    2. Boiling Point: 428.86°C (rough estimate)
    3. Flash Point: 215.1°C
    4. Appearance: Beige/Crystalline Powder
    5. Density: 1.1226 (rough estimate)
    6. Vapor Pressure: 0mmHg at 25°C
    7. Refractive Index: 1.6000 (estimate)
    8. Storage Temp.: Freezer (-20°C)
    9. Solubility: N/A
    10. CAS DataBase Reference: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(CAS DataBase Reference)
    11. NIST Chemistry Reference: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(166773-08-6)
    12. EPA Substance Registry System: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(166773-08-6)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: 24/25
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 166773-08-6(Hazardous Substances Data)

166773-08-6 Usage

Chemical Properties

beige crystalline powder

Check Digit Verification of cas no

The CAS Registry Mumber 166773-08-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,7,7 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 166773-08:
(8*1)+(7*6)+(6*6)+(5*7)+(4*7)+(3*3)+(2*0)+(1*8)=166
166 % 10 = 6
So 166773-08-6 is a valid CAS Registry Number.
InChI:InChI=1/C20H17N3/c1-4-10-17(11-5-1)20-21-23(19-14-8-3-9-15-19)16-22(20)18-12-6-2-7-13-18/h1-15H,16H2

166773-08-6SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 20, 2017

Revision Date: Aug 20, 2017

1.Identification

1.1 GHS Product identifier

Product name 2,4,5-triphenyl-3H-1,2,4-triazole

1.2 Other means of identification

Product number -
Other names 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazolin-5-ylidene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
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:166773-08-6 SDS

166773-08-6Relevant articles and documents

N-Heterocyclic carbene-mediated redox condensation of alcohols

Kato, Terumasa,Matsuoka, Shin-Ichi,Suzuki, Masato

supporting information, p. 8569 - 8572 (2016/07/13)

N-Heterocyclic carbenes (NHCs) with a variety of oxidants promote the Mitsunobu-type coupling reactions of alcohols with phenols, carboxylic acids, and phthalimide. Experiments using a chiral alcohol indicate that these reactions proceed via SN1 or SN2 pathways depending on the polarity of the used solvents. The NHCs are consumed as reducing reagents to form their oxides as readily separable byproducts.

PROCESS FOR THE DIMERIZATION OF ACTIVATED OLEFINS

-

Page/Page column 14; 15, (2015/12/08)

The present invention relates to a process for the preparation of compounds or a mixture of compounds of the general formulae I.a or I.b wherein R1 is selected from C1-C12-alkyl, C3-C6-cycloalkyl, -C(

Cooperative N-heterocyclic carbene/Br?nsted acid catalysis for the tail-to-tail (co)dimerization of methacrylonitrile

Kato, Terumasa,Matsuoka, Shin-Ichi,Suzuki, Masato

, p. 4484 - 4491 (2014/06/09)

The first tail-to-tail dimerization of methacrylonitrile (MAN) has been realized by the cooperative use of N-heterocyclic carbene (NHC) and Br?nsted acid catalysts, producing 2,5-dimethylhex-2-enedinitrile with the E/Z ratio of 24:76. Although the NHC alo

Aldehyde umpolung by N-heterocyclic carbenes: NMR characterization of the breslow intermediate in its keto form, and a spiro-dioxolane as the resting state of the catalytic system

Berkessel, Albrecht,Elfert, Silvia,Etzenbach-Effers, Kerstin,Teles, J. Henrique

body text, p. 7120 - 7124 (2010/12/18)

Surprises from a classic: The Breslow intermediate of triazolylidene- catalyzed benzoin condensations was characterized for the first time by NMR spectroscopy in its keto form (K, energetic minimum). The hitherto unknown spiro-dioxolane S, generated from

Preparation and application of 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene, a stable carbene

Enders, Dieter,Breuer, Klaus,Kallfass, Ulrike,Balensiefer, Tim

, p. 1292 - 1295 (2007/10/03)

The title compound 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene has been prepared in quantitative yield from the corresponding 5-methoxytriazoline precursor by simple thermal decomposition in vacuo via α-elimination of methanol. The carbene is a

Catalytic application of a Ru-alkylidene in the nucleophilic addition of several carboxylic acids on terminal alkynes and the homo-coupling of 1-alkynes

Melis, Karen,De Vos, Dirk,Jacobs, Pierre,Verpoort, Francis

, p. 131 - 136 (2007/10/03)

Thermal treatment of Ru-alkylidene (4) bearing a triazol-5-ylidene (NHC) ligand (2) at 110°C and addition of a terminal alkyne generates a ruthenium vinylidene. The thermolysed Ru-alkylidene catalyses the vinylation and dimerisation of 1-alkynes. The nucleophilic addition of acetic acid on terminal alkynes proceeds smoothly and regioselective towards the Markovnikov addition. The addition reaction can be tuned by changing the acidity of the carboxylic acid. At increasing acidity, higher conversion of the triple bond is obtained and the vinylation/dimerisation ratio increases. The direct coupling between two 1-alkynes shows a reactivity order, which decreases from 1-octyne > 1,7-octadiyne > phenylacetylene > 3,3 dimethyl-1-butyne. The regioselectivity is strongly dependent on the nature of the terminal alkyne.

Catalytic application of a Ru-alkylidene in the nucleophilic addition of several carboxylic acids on terminal alkynes and the homo-coupling of 1-alkynes

Melis, Karen,De Vos, Dirk,Jacobs, Pierre,Verpoort, Francis

, p. 131 - 136 (2015/03/04)

Thermal treatment of Ru-alkylidene (4) bearing a triazol-5-ylidene (NHC) ligand (2) at 110 °C and addition of a terminal alkyne generates a ruthenium vinylidene. The thermolysed Ru-alkylidene catalyses the vinylation and dimerisation of 1-alkynes. The nucleophilic addition of acetic acid on terminal alkynes proceeds smoothly and regioselective towards the Markovnikov addition. The addition reaction can be tuned by changing the acidity of the carboxylic acid. At increasing acidity, higher conversion of the triple bond is obtained and the vinylation/dimerisation ratio increases. The direct coupling between two 1-alkynes shows a reactivity order, which decreases from 1-octyne>1,7-octadiyne>phenylacetylene>3,3 dimethyl-1-butyne. The regioselectivity is strongly dependent on the nature of the terminal alkyne.

Darstellung, Struktur und Reaktivitaet von 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-yliden, einem neuen stabilen Carben

Enders, Dieter,Breuer, Klaus,Raabe, Gerhard,Runsink, Jan,Teles, J. Henrique,et al.

, p. 1119 - 1122 (2007/10/02)

Stichworte: Carbene * Cycloadditionen * Heterocyclen * Insertionen

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