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11,1,1-Trifluoroethane, also known as HFC-143a, is a colorless, odorless, non-flammable, and low toxicity fluorinated gas. It is commonly used as a refrigerant in air conditioning and refrigeration systems, offering a relatively low global warming potential compared to ozone-depleting refrigerants. However, it is still a greenhouse gas contributing to climate change, and its production is being phased out in many countries under the Montreal Protocol to reduce greenhouse gas emissions and mitigate climate change.

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  • 420-46-2 Structure
  • Basic information

    1. Product Name: 11,1,1-Trifluoroethane
    2. Synonyms: 1,1,1-Trifluoroform;CFC 143A;FC 143a;Freon 143a;HCF 143a;HCFC 143a;HFC 143a;Methylfluoroform;R 143a;TG 143a;
    3. CAS NO:420-46-2
    4. Molecular Formula: C2H3F3
    5. Molecular Weight: 84.05
    6. EINECS: 206-996-5
    7. Product Categories: N/A
    8. Mol File: 420-46-2.mol
    9. Article Data: 56
  • Chemical Properties

    1. Melting Point: -111.3 °C
    2. Boiling Point: -47 °C
    3. Flash Point: N/A
    4. Appearance: colourless gas
    5. Density: 1.078 g/cm3
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: 11,1,1-Trifluoroethane(CAS DataBase Reference)
    10. NIST Chemistry Reference: 11,1,1-Trifluoroethane(420-46-2)
    11. EPA Substance Registry System: 11,1,1-Trifluoroethane(420-46-2)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: R11:Highly flammable.;
    3. Safety Statements: S16:Keep away from sources of ignition - No smoking.; S33:Take precautionary measures against static discharges.;
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 420-46-2(Hazardous Substances Data)

420-46-2 Usage

Uses

Used in Air Conditioning and Refrigeration Industry:
11,1,1-Trifluoroethane is used as a refrigerant for air conditioning and refrigeration systems due to its non-flammable nature, low toxicity, and relatively low global warming potential. It serves as a popular alternative to ozone-depleting refrigerants such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), helping to reduce the environmental impact of these systems.
Used in Climate Change Mitigation Efforts:
11,1,1-Trifluoroethane is used in the development of more environmentally friendly refrigerants, as its production is being phased out in many countries. This contributes to the reduction of greenhouse gas emissions and the mitigation of climate change, aligning with global efforts to transition to more sustainable and eco-friendly alternatives.

Check Digit Verification of cas no

The CAS Registry Mumber 420-46-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 0 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 420-46:
(5*4)+(4*2)+(3*0)+(2*4)+(1*6)=42
42 % 10 = 2
So 420-46-2 is a valid CAS Registry Number.
InChI:InChI=1/C2H3F3/c1-2(3,4)5/h1H3

420-46-2Synthetic route

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
at 200℃; for 2h; Conversion of starting material;100%
With hydrogen fluoride; chlorine; antimonypentachloride at 15 - 20℃; under 6750.68 Torr;97%
With hydrogen fluoride; chromium(III) water-soluble salt; graphite; magnesium oxide; water; mixture of, dried at 150 C, hydrofluorinated at 200-350 C at 200℃; under 7500.75 Torr; Continious process;
With neodymium(III) oxide; hydrogen fluoride; antimony pentafluoride at 10℃; under 2250.23 Torr; Reagent/catalyst; Large scale;
2-oxo-propionic acid
127-17-3

2-oxo-propionic acid

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With sulfur tetrafluoride at 20℃; for 12h; steel autoclave;98%
1,1-dichlorotetrafluoroethane
374-07-2

1,1-dichlorotetrafluoroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1,1,1,2-tetrafluoroethane
811-97-2

1,1,1,2-tetrafluoroethane

C

1,1,1,2-tetrafluoro-2-chloroethane
2837-89-0

1,1,1,2-tetrafluoro-2-chloroethane

Conditions
ConditionsYield
With hydrogen; palladium/alumina at 140℃; Product distribution; Mechanism; var. temp.; other catalysts;A 5.5%
B 84.3%
C 10.2%
With hydrogen; palladium at 149.85℃; under 770 Torr; Rate constant; Product distribution; Thermodynamic data; E(a); other Pd catalysts; effect of HCl and sulfur;
With hydrogen; palladium/alumina at 199.85℃; for 15h; Product distribution; also fluorinated aluminas catalysts; other substrate;
With hydrogenchloride; hydrogen; 5percent Pd/C-H Kinetics; Activation energy; Further Variations:; Catalysts; Dehydrochlorination;
HCFC-141b
1717-00-6

HCFC-141b

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
at 200℃; for 2h; Conversion of starting material;82%
1,1-Dichloroethylene
75-35-4

1,1-Dichloroethylene

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

C

HCFC-141b
1717-00-6

HCFC-141b

Conditions
ConditionsYield
With hydrogen fluoride; SbCl5 on Carbon at 100℃; under 760.051 Torr; for 0.00277778h;A 80%
B n/a
C n/a
(Z)-5,5,6,6-Tetrafluoro-4-hydroxy-hex-3-en-2-one
82750-12-7

(Z)-5,5,6,6-Tetrafluoro-4-hydroxy-hex-3-en-2-one

A

2,3,3,4,4-pentafluorobut-1-ene
721946-10-7

2,3,3,4,4-pentafluorobut-1-ene

B

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With sulfur tetrafluoride at 80℃; for 20h; Autoclave;A 58%
B 7%
1,1-difluoroethane
75-37-6

1,1-difluoroethane

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With manganese(IV) oxide; hydrogen fluoride at 125℃;
With chromium(III) oxide; hydrogen fluoride at 50℃; unter Druck;
With hydrogen fluoride; lead dioxide at 125℃;
1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1-chloro-1-fluoroethane
2317-91-1

1-chloro-1-fluoroethane

Conditions
ConditionsYield
With aluminum(III) fluoride at 325℃;
With aluminum(III) fluoride at 300 - 400℃;
1,1,1-trichloroethane
71-55-6

1,1,1-trichloroethane

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With hydrogen fluoride at 210℃; under 268460 Torr;
With hydrogen fluoride; antimonypentachloride at 30 - 40℃; under 27949.3 Torr;
With aluminium fluoride oxide-cobalt halide; hydrogen fluoride at 290℃;
1,1,1-trifluoro-2-chloroethane
75-88-7

1,1,1-trifluoro-2-chloroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1,1,1,4,4,4-hexafluorobutane
407-59-0

1,1,1,4,4,4-hexafluorobutane

C

1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane
384-54-3

1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane

Conditions
ConditionsYield
mit UV-Licht.Irradiation;
Vinylidene fluoride
75-38-7

Vinylidene fluoride

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With aluminum(III) fluoride; hydrogen fluoride
1,1-Dichloroethylene
75-35-4

1,1-Dichloroethylene

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

Conditions
ConditionsYield
With hydrogen fluoride; diphenylamine at 180 - 195℃; unter Druck;
trifluoroacetic anhydride
407-25-0

trifluoroacetic anhydride

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With dibutyl ether; platinum under 29420.3 - 36775.4 Torr; Hydrogenation;
acetic acid
64-19-7

acetic acid

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

α,α,α',α'-Tetrafluordiaethylaether
38217-11-7

α,α,α',α'-Tetrafluordiaethylaether

Conditions
ConditionsYield
With sulfur tetrafluoride at -10℃; for 48h;
2,2,2-trifluorodiazoethane
371-67-5

2,2,2-trifluorodiazoethane

cyclohexene
110-83-8

cyclohexene

A

trans-1,1,1,4,4,4-hexafluoro-2-butene
66711-86-2

trans-1,1,1,4,4,4-hexafluoro-2-butene

B

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

C

7-Trifluormethyl-norcaran
2355-93-3

7-Trifluormethyl-norcaran

D

1,1,2-trifluoroethylene
359-11-5

1,1,2-trifluoroethylene

Conditions
ConditionsYield
for 168h; Irradiation;
benzoic acid methyl ester
93-58-3

benzoic acid methyl ester

trifluoromethanide
54128-17-5

trifluoromethanide

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

benzoate
766-76-7

benzoate

Conditions
ConditionsYield
In gas Thermodynamic data; ΔH0, nucleophilic reactions of F3C- at sp2 and sp3 carbon in the gas phase, competitive reactions;
1,1,1-trichloroethane
71-55-6

1,1,1-trichloroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

C

HCFC-141b
1717-00-6

HCFC-141b

D

1,1-Dichloroethylene
75-35-4

1,1-Dichloroethylene

Conditions
ConditionsYield
With fluorinated (with SF4) γ-alumina; hydrogen fluoride for 2h; Product distribution; Ambient temperature;
With hydrogen fluoride; antimonypentachloride at 60℃; under 7500.6 Torr; Mechanism; var. reaction partners and temp.;
With chromium(III) oxide; sulfur tetrafluoride; hydrogen fluoride at 20℃; for 2h; Product distribution; Further Variations:; Reagents;
1,1-dichlorotetrafluoroethane
374-07-2

1,1-dichlorotetrafluoroethane

1,2-dichloro-1,1,2,2-tetrafluoroethane
76-14-2

1,2-dichloro-1,1,2,2-tetrafluoroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1,1,1,2-tetrafluoroethane
811-97-2

1,1,1,2-tetrafluoroethane

C

1,1,2,2-tetrafluoroethane
359-35-3

1,1,2,2-tetrafluoroethane

D

2-chloro-1,1,2,2-tetrafluoroethane
354-25-6

2-chloro-1,1,2,2-tetrafluoroethane

E

1,1,1,2-tetrafluoro-2-chloroethane
2837-89-0

1,1,1,2-tetrafluoro-2-chloroethane

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal at 240℃; for 0.00611111h; Product distribution; Mechanism; other times, other temperatures;
trifluoroacetic acid-methyl ester
431-47-0

trifluoroacetic acid-methyl ester

trifluoromethanide
54128-17-5

trifluoromethanide

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

trifluoroacetate
14477-72-6

trifluoroacetate

Conditions
ConditionsYield
In gas Rate constant; Thermodynamic data; ΔH0, nucleophilic reactions of F3C- at sp2 and sp3 carbon in the gas phase, competitive reactions;
2,2,2-Trifluoroethyl p-toluenesulfonate
433-06-7

2,2,2-Trifluoroethyl p-toluenesulfonate

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With lithium aluminium tetrahydride
methyltrifluoromethyldioxirane
115464-59-0

methyltrifluoromethyldioxirane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

acetic acid methyl ester
79-20-9

acetic acid methyl ester

C

trifluoroacetic acid-methyl ester
431-47-0

trifluoroacetic acid-methyl ester

D

carbon dioxide
124-38-9

carbon dioxide

E

trifluoromethyl acetate
74123-20-9

trifluoromethyl acetate

F

trifluoroacetic acid
76-05-1

trifluoroacetic acid

Conditions
ConditionsYield
In tetrachloromethane; chloroform-d1 at 20℃; for 0.166667h; Product distribution; Mechanism; Irradiation; thermal and photochemical dicomposition in gas, solution, and matrix phases;A 1 % Spectr.
B 14 % Spectr.
C 18 % Spectr.
D n/a
E 53 % Spectr.
F 14 % Spectr.
1,1,2-trifluoroethylene
359-11-5

1,1,2-trifluoroethylene

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1,1,2-Trifluoroethan
430-66-0

1,1,2-Trifluoroethan

C

1,1,1,4,4,4-hexafluorobutane
407-59-0

1,1,1,4,4,4-hexafluorobutane

D

1,2,2,3,3,4-hexafluoro-butane
114810-02-5

1,2,2,3,3,4-hexafluoro-butane

E

1,1,1,3,4,4-Hexafluoro-butane

1,1,1,3,4,4-Hexafluoro-butane

F

1,1,1,3,3,4-Hexafluoro-butane

1,1,1,3,3,4-Hexafluoro-butane

Conditions
ConditionsYield
With hydrogen; mercury under 100 - 750 Torr; Product distribution; Ambient temperature; Irradiation; different H2 pressure;
1,1,2-trifluoroethylene
359-11-5

1,1,2-trifluoroethylene

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1,1,1,4,4,4-hexafluorobutane
407-59-0

1,1,1,4,4,4-hexafluorobutane

C

1,2,2,3,3,4-hexafluoro-butane
114810-02-5

1,2,2,3,3,4-hexafluoro-butane

D

1,1,1,3,4,4-Hexafluoro-butane

1,1,1,3,4,4-Hexafluoro-butane

E

1,1,1,3,3,4-Hexafluoro-butane

1,1,1,3,3,4-Hexafluoro-butane

F

1,1,2,3,3,4-hexafluorobutane

1,1,2,3,3,4-hexafluorobutane

Conditions
ConditionsYield
With hydrogen; mercury under 100 - 750 Torr; Product distribution; Ambient temperature; Irradiation; different H2 pressure;
2,2-dimethylpropane
463-82-1

2,2-dimethylpropane

Hexafluoroacetone
684-16-2

Hexafluoroacetone

A

methane
34557-54-5

methane

B

ethane
74-84-0

ethane

C

propane
74-98-6

propane

D

ethene
74-85-1

ethene

E

trifluoromethan
75-46-7

trifluoromethan

F

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
at 300℃; for 2h; Product distribution; Mechanism; Irradiation; other temperature, UV lamp, reaction time, in packed and unpacked vessel;
Hexafluoroacetone
684-16-2

Hexafluoroacetone

acetone
67-64-1

acetone

A

ethane
74-84-0

ethane

B

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

C

Hexafluoroethane
76-16-4

Hexafluoroethane

Conditions
ConditionsYield
In ethyl acetate for 0.5h; Product distribution; Irradiation; further temperature;
trifluoromethanide
54128-17-5

trifluoromethanide

carbonic acid dimethyl ester
616-38-6

carbonic acid dimethyl ester

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

methyl carbonate
49745-25-7

methyl carbonate

Conditions
ConditionsYield
In gas nucleophilic reactions of F3C- at sp2 and sp3 carbon in the gas phase, competitive reactions;
metyhyl chlorodifluoroacetate
1514-87-0

metyhyl chlorodifluoroacetate

methyl iodide
74-88-4

methyl iodide

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With potassium fluoride; copper(l) iodide; cadmium(II) iodide In N,N,N,N,N,N-hexamethylphosphoric triamide at 120℃; for 8h;81 % Turnov.
methyl bromodifluoroacetate
683-98-7

methyl bromodifluoroacetate

methyl iodide
74-88-4

methyl iodide

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Conditions
ConditionsYield
With potassium fluoride; copper(l) iodide; cadmium(II) iodide In N,N,N,N,N,N-hexamethylphosphoric triamide at 90℃; for 8h;75 % Turnov.
1,1,1-trichloroethane
71-55-6

1,1,1-trichloroethane

A

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

B

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

C

HCFC-141b
1717-00-6

HCFC-141b

D

Vinylidene fluoride
75-38-7

Vinylidene fluoride

Conditions
ConditionsYield
With fluorinated Fe3O4 for 2h; Ambient temperature; Yields of byproduct given. Title compound not separated from byproducts;
1,1-Dichloroethylene
75-35-4

1,1-Dichloroethylene

A

1,1,1-Trichloro-2,2,2-trifluoroethane
354-58-5

1,1,1-Trichloro-2,2,2-trifluoroethane

B

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

C

1-Chloro-1,1-difluoroethane
75-68-3

1-Chloro-1,1-difluoroethane

D

HCFC-141b
1717-00-6

HCFC-141b

Conditions
ConditionsYield
With fluorinated Co3O4 for 2h; Ambient temperature; Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

4C66H51N15O12*4O4P(3-)*12K(1+)*12C12H24O6*C2H3N

4C66H51N15O12*4O4P(3-)*12K(1+)*12C12H24O6*C2H3N

4C66H51N15O12*4O4P(3-)*12K(1+)*12C12H24O6*C2H3F3

4C66H51N15O12*4O4P(3-)*12K(1+)*12C12H24O6*C2H3F3

Conditions
ConditionsYield
In water at 20℃;90%
polytetrafluoroethylene
116-14-3

polytetrafluoroethylene

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,1,2,2,3,3-heptafluorobutane
662-00-0

1,1,1,2,2,3,3-heptafluorobutane

Conditions
ConditionsYield
With antimony pentafluoride at 50℃; for 16h;89%
perfluoropropylene
116-15-4

perfluoropropylene

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,1,2,3,3,5,5,5-Nonafluoropentan
58705-99-0

1,1,1,2,3,3,5,5,5-Nonafluoropentan

Conditions
ConditionsYield
at 310℃; for 144h;71%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,2-trifluoroethylene
359-11-5

1,1,2-trifluoroethylene

A

1,1,1,2,3,3-hexafluorobutane
76523-97-2

1,1,1,2,3,3-hexafluorobutane

B

1,1,1,3,4,4-Hexafluoro-butane

1,1,1,3,4,4-Hexafluoro-butane

C

1,1,1,3,3,4-Hexafluoro-butane

1,1,1,3,3,4-Hexafluoro-butane

Conditions
ConditionsYield
With antimony pentafluoride at 20℃; for 8h; Title compound not separated from byproducts;A 70%
B 1%
C 2%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

thiourea
17356-08-0

thiourea

3,3,3-trifluoro-propane-1-thiol
69412-76-6

3,3,3-trifluoro-propane-1-thiol

Conditions
ConditionsYield
Stage #1: 2,2,2-trifluoroethanol; thiourea In ethanol; water at 90℃; for 5h;
Stage #2: With water; sodium hydroxide for 3h; pH=12 - Ca. 13; Reflux;
65%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

p-vinylbiphenyl
2350-89-2

p-vinylbiphenyl

C16H14F3N3

C16H14F3N3

Conditions
ConditionsYield
With copper(l) iodide; tetrabutylammoniun azide; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl In acetonitrile at 20℃; Irradiation;65%
cis-[Ru(PMe3)4(H)(NH2)]
482314-33-0

cis-[Ru(PMe3)4(H)(NH2)]

2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

cis-[Ru(PMe3)4(H)(NH3)]F
482314-43-2

cis-[Ru(PMe3)4(H)(NH3)]F

Conditions
ConditionsYield
In benzene mixt. was stirred at room temp. for 48 h in closed vessel; soln. was evapd. to dryness, residue was dissolved in THF, layered with pentane, cooled to -35°C over 24 h; elem. anal.;59%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

Vinylidene fluoride
75-38-7

Vinylidene fluoride

1,1,1,5,5,5-Hexafluoro-3-methyl-3-(2,2,2-trifluoro-ethyl)-pentane

1,1,1,5,5,5-Hexafluoro-3-methyl-3-(2,2,2-trifluoro-ethyl)-pentane

Conditions
ConditionsYield
With antimony pentafluoride at 20℃; for 8h;45%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,2-dichloro-1,2-difluoroethene
598-88-9

1,2-dichloro-1,2-difluoroethene

1,2-Dichloro-1,1,2,3,3-pentafluoro-butane

1,2-Dichloro-1,1,2,3,3-pentafluoro-butane

Conditions
ConditionsYield
With antimony pentafluoride for 8h;16%
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

2-bromo-1,1,1-trifluoroethane
421-06-7

2-bromo-1,1,1-trifluoroethane

Conditions
ConditionsYield
With bromine at 500℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,1-trifluoro-2-chloroethane
75-88-7

1,1,1-trifluoro-2-chloroethane

Conditions
ConditionsYield
With chlorine at 500℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

A

Vinylidene fluoride
75-38-7

Vinylidene fluoride

B

1,1,2,2-tetrafluorocyclobutane
374-12-9

1,1,2,2-tetrafluorocyclobutane

Conditions
ConditionsYield
at 750 - 910℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,1-trifluoro-2,2-dichloroethane
306-83-2

1,1,1-trifluoro-2,2-dichloroethane

Conditions
ConditionsYield
With chlorine at 497℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

2,2-dibromo-1,1,1-trifluoro-ethane
354-30-3

2,2-dibromo-1,1,1-trifluoro-ethane

Conditions
ConditionsYield
With bromine at 500℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,1-tribromotrifluoroethane
354-48-3

1,1,1-tribromotrifluoroethane

Conditions
ConditionsYield
With bromine at 600℃;
2,2,2-trifluoroethanol
420-46-2

2,2,2-trifluoroethanol

1,1,2,2-tetrafluorocyclobutane
374-12-9

1,1,2,2-tetrafluorocyclobutane

Conditions
ConditionsYield
at 820℃;

420-46-2Relevant articles and documents

Formation of CF3O- in the gas phase

Morris, Robert A.

, p. 8436 - 8442 (1999)

We report experimental studies of the formation of CF3O- by ion-molecule and electron attachment reactions, and theoretical investigations of the structure and energetics of CF3O- and its neutral counterpart CF3O. The anion CF3O- is formed from the rapid attachment of free electrons to its neutral dimer, (CF3O)2. Potential sources of CF3O- through ion-molecule reactions of CF3- and F- were surveyed. CF3O- is formed in the bimolecular ion-molecule reaction of CF3- with SO2 and the third-order association reaction of F- with CF2O. In addition, rate constants for the reactions of CF3- with a variety of neutral compounds were measured. A number of cases were found in which formation of CF3O- was energetically allowed but was not observed. The potential energy surfaces of CF3O and CF3O- have been investigated using a variety of density functional theory (DFT) techniques. The ground-state minimum energy structure of CF3O was found to be a 2A′ Jahn-Teller distorted Cs-symmetry structure, while for the anion the ground state is 1A1 with a C3v-symmetry minimum. A search for other low-energy minima for CF3O- was unsuccessful. The DFT methods support a value for the adiabatic electron affinity of CF3O near 4.1 eV.

Direct Superacid-Promoted Difluoroethylation of Aromatics

Artault, Maxime,Martin-Mingot, Agnès,Thibaudeau, Sébastien,Vitse, Kassandra

supporting information, (2021/12/22)

Under superacid conditions, aromatic amines are directly and regioselectively 1,1-difluoroethylated. Low temperature in situ NMR studies confirmed the presence of benzylic α-fluoronium and α-chloronium ions as key intermediates in the reaction. This method has a wide substrate scope and can be applied to the late-stage functionalization of natural alkaloids and active pharmaceutical ingredients.

Using Chlorotrifluoroethane for Trifluoroethylation of (Hetero)aryl Bromides and Chlorides via Nickel Catalysis

Li, Xuefei,Gao, Xing,He, Chun-Yang,Zhang, Xingang

supporting information, p. 1400 - 1405 (2021/02/20)

A nickel-catalyzed reductive cross-coupling between industrial chemical CF3CH2Cl and (hetero)aryl bromides and chlorides has been reported. The reaction is synthetically simple without the preparation of arylmetals and exhibits high functional group tolerance. The utility of this protocol has been demonstrated by the late-stage modification of pharmaceuticals, providing a facile route for medicinal chemistry.

C(sp3)-CF3Reductive Elimination from a Five-Coordinate Neutral Copper(III) Complex

Liu, Shuanshuan,Liu, Shuanshuan,Liu, He,Liu, Shihan,Lu, Zehai,Lu, Changhui,Leng, Xuebing,Lan, Yu,Shen, Qilong

supporting information, p. 9785 - 9791 (2020/07/10)

The reductive elimination from a high-valent late-transition-metal complex for the formation of a carbon-carbon or carbon-heteroatom bond represents a fundamental product-forming step in a number of catalytic processes. While reductive eliminations from well-defined Pt(IV), Pd(IV), Ni(III)/Ni(IV), and Au(III) complexes have been studied, the analogous reactions from neutral Cu(III) complexes remain largely unexplored. Herein, we report the isolation of a stable, five-coordinate, neutral square pyramidal Cu(III) complex that gives CH3-CF3 in quantitative yield via reductive elimination. Mechanistic studies suggest that the reaction occurs through a synchronous bond-breaking/bond-forming process via a three-membered ring transition state.

Improved Access to Organo-Soluble Di- and Tetrafluoridochlorate(I)/(III) Salts

Kaupp, M.,Müller, R.,Pr?hm, P.,Riedel, S.,Schattenberg, C. J.,Schmid, J. R.,Sonnenberg, K.,Steinhauer, S.,Vo?nacker, P.

supporting information, p. 16002 - 16006 (2020/07/20)

A facile one-pot gram-scale synthesis of tetraalkylammonium tetrafluoridochlorate(III) [cat][ClF4] ([cat]=[NEt3Me]+, [NEt4]+) is described. An acetonitrile solution of the corresponding alkylammonium chloride salt is fluorinated with diluted fluorine at low temperatures. The reaction proceeds via the [ClF2]? anion which is structurally characterized for the first time. The potential application of [ClF4]? salts as fluorinating agents is evaluated by the reaction with diphenyl disulfide, Ph2S2, to pentafluorosulfanyl benzene, PhSF5. The CN moieties in acetonitrile and [B(CN)4]? are transferred in CF3 groups. Exposure of carbon monoxide, CO, leads to the formation of carbonyl fluoride, COF2, and elemental gold is dissolved under the formation of tetrafluoridoaurate [AuF4]?.

Preparation method of 1,1,1-trifluoroethane

-

Paragraph 0021-0035, (2019/06/08)

The invention provides a preparation method of 1,1,1-trifluoroethane (HFC-143a). The HFC-143a is prepared through liquid-phase fluoridation reaction under the presence of a composite catalyst by utilizing hydrogen fluoride (HF) and HCFC-142b as raw materials, the reaction temperature is 10-50 DEG C, preferably 10-40 DEG C, the weight ratio of the HF to the HCFC-142b is 1 to (4-5.5), preferably 1 to (4.5-5), the composite catalyst is a mixture of antimony halide and rare earth oxides, and rare earth metal is preferably neodymium or yttrium; the molar ratio of the antimony halide to the rare earth oxides is (20-200) to 1, preferably (20-150) to 1. According to the preparation method, the HFC-143a is prepared through liquid-phase fluoridation of the HF and the HCFC-142b, the conversion rate can reach 99.5% or above, the conversion rate of 98% or above can still be kept after continuous reaction for 1000 h, and the service life of the catalyst is prolonged.

Connecting Organometallic Ni(III) and Ni(IV): Reactions of Carbon-Centered Radicals with High-Valent Organonickel Complexes

Bour, James R.,Ferguson, Devin M.,McClain, Edward J.,Kampf, Jeff W.,Sanford, Melanie S.

supporting information, p. 8914 - 8920 (2019/06/13)

This paper describes the one-electron interconversions of isolable NiIII and NiIV complexes through their reactions with carbon-centered radicals (R?). First, model NiIII complexes are shown to react with alkyl and aryl radicals to afford NiIV products. Preliminary mechanistic studies implicate a pathway involving direct addition of a carbon-centered radical to the NiIII center. This is directly analogous to the known reactivity of NiII complexes with R?, a step that is commonly implicated in catalysis. Second, a NiIV-CH3 complex is shown to react with aryl and alkyl radicals to afford C-C bonds via a proposed SH2-type mechanism. This pathway is leveraged to enable challenging H3C-CF3 bond formation under mild conditions. Overall, these investigations suggest that NiII/III/IV sequences may be viable redox pathways in high-oxidation-state nickel catalysis.

A catalytic fluoride-rebound mechanism for C(sp3)-CF3 bond formation

Levin, Mark D.,Chen, Tiffany Q.,Neubig, Megan E.,Hong, Cynthia M.,Theulier, Cyril A.,Kobylianskii, Ilia J.,Janabi, Mustafa,O'Neil, James P.,Toste, F. Dean

, p. 1272 - 1275 (2017/06/30)

The biological properties of trifluoromethyl compounds have led to their ubiquity in pharmaceuticals, yet their chemical properties have made their preparation a substantial challenge, necessitating innovative chemical solutions. We report the serendipitous discovery of a borane-catalyzed formal C(sp3)-CF3 reductive elimination from Au(III) that accesses these compounds by a distinct mechanism proceeding via fluoride abstraction, migratory insertion, and C-F reductive elimination to achieve a net C-C bond construction. The parent bis(trifluoromethyl)Au(III) complexes tolerate a surprising breadth of synthetic protocols, enabling the synthesis of complex organic derivatives without cleavage of the Au-C bond. This feature, combined with the fluoride-rebound mechanism, was translated into a protocol for the synthesis of 18F-radiolabeled aliphatic CF3-containing compounds, enabling the preparation of potential tracers for use in positron emission tomography.

Silver-Catalyzed Decarboxylative Trifluoromethylation of Aliphatic Carboxylic Acids

Tan, Xinqiang,Liu, Zhonglin,Shen, Haigen,Zhang, Pei,Zhang, Zhenzhen,Li, Chaozhong

, p. 12430 - 12433 (2017/09/25)

The silver-catalyzed decarboxylative trifluoromethylation of aliphatic carboxylic acids is described. With AgNO3 as the catalyst and K2S2O8 as the oxidant, the reactions of aliphatic carboxylic acids with (bpy)C

PROCESS FOR THE CO-PRODUCTION OF OF 2,3,3,3-TETRAFLUOROPROPENE AND 1,3,3,3-TETRAFLUOROPROPENE

-

Page/Page column 11, (2017/02/09)

The present invention provides a method of producing 2,3,3,3-tetrafluoropropene (HFO- 1234yf), wherein the method comprises two or more reaction steps, at least one of said reaction steps comprising the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze) and/or one or more HFO-1234ze precursors from one or more HFO-1234yf precursors, wherein at least a portion of the HFO-1234ze is recovered.

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