Difluorochloromethane
- Formula: CHClF2
- Molecular weight: 86.468
- IUPAC Standard InChI: InChI=1S/CHClF2/c2-1(3)4/h1H
- IUPAC Standard InChIKey: VOPWNXZWBYDODV-UHFFFAOYSA-N
- CAS Registry Number: 75-45-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: Methane, chlorodifluoro-; Algeon 22; Algofrene Type 6; Arcton 4; Chlorodifluoromethane; Difluoromonochloromethane; Electro-CF 22; F 22; Freon 22; Frigen 22; FC 22; Genetron 22; Isotron 22; Monochlorodifluoromethane; R 22; Ucon 22; CHF2Cl; Algofrene 22; Arcton 22; CFC 22; Daiflon 22; Dymel 22; Eskimon 22; Flugene 22; Fluorocarbon-22; Forane 22; Frigen; Haltron 22; Isceon 22; Khaladon 22; Monochlorodifluormethane; Propellant 22; Refrigerant 22; UN 1018; CHClF2; Algofrene 6; Khladon 22; Flon 22; F 22 (halocarbon); FKW 22; HCFC 22; HFA-22; Refrigerant R 22; Methane, difluoro chloro
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°liquid | 179.91 | J/mol*K | N/A | Neilson and White, 1957 |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 93.01 | 232.50 | Neilson and White, 1957 | T = 16 to 230 K. |
| 114.10 | 298.15 | Benning, McHarness, et al., 1940 | T = 256 to 328 K. Data calculated from equation. |
Reaction thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
CClF2- + =
By formula: CClF2- + H+ = CHClF2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | >1567.8 | kJ/mol | Acid | Paulino and Squires, 1991 | gas phase; Probably CF2..Cl-, non-covalent.; B |
| ΔrH° | 1583. ± 29. | kJ/mol | D-EA | Dispert and Lacmann, 1978 | gas phase; From CF2Cl2; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | >1535.4 ± 3.7 | kJ/mol | H-TS | Paulino and Squires, 1991 | gas phase; Probably CF2..Cl-, non-covalent.; B |
| ΔrG° | 1550. ± 30. | kJ/mol | H-TS | Dispert and Lacmann, 1978 | gas phase; From CF2Cl2; B |
+
= (
•
)
By formula: Cl- + CHClF2 = (Cl- • CHClF2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 72.0 ± 8.4 | kJ/mol | IMRE | Larson and McMahon, 1984 | gas phase; B,M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 96.2 | J/mol*K | N/A | Larson and McMahon, 1984 | gas phase; switching reaction(Cl-)CF3H, Entropy change calculated or estimated; Larson and McMahon, 1984, 2; M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 43.1 ± 8.4 | kJ/mol | IMRE | Larson and McMahon, 1984 | gas phase; B,M |
2 =
+ 2
By formula: 2CHClF2 = C2F4 + 2HCl
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 121.6 | kJ/mol | Kin | Edwards and Small, 1965 | gas phase; Corrected for CODATA value of ΔfH; ALS |
2 =
+
By formula: 2CHCl2F = CHCl3 + CHClF2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -14.2 ± 2.0 | kJ/mol | Eqk | Hess and Kemnitz, 1992 | gas phase; Gas Phase; ALS |
2 =
+
By formula: 2CHClF2 = CHCl2F + CHF3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -14.2 ± 2.0 | kJ/mol | Eqk | Hess and Kemnitz, 1992 | gas phase; ALS |
Gas Chromatography
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Normal alkane RI, non-polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | OV-101 | 301. | Zenkevich, 2005 | 25. m/0.20 mm/0.10 μm, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | Methyl Silicone | 305. | Blunden, Aneja, et al., 2005 | 60. m/0.32 mm/1.0 μm, Helium; Program: -50 0C (2 min) 8 0C/min -> 200 0C (7.75 min) 25 0C -> 225 0C (8 min) |
| Capillary | SPB-1 | 258. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
| Capillary | SPB-1 | 309. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C |
References
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Neilson and White, 1957
Neilson, E.F.; White, D.,
The heat capacity, heat of fusion, heat of transition and heat of vaporization of chlorodifluoromethane between 16°K and the boiling point,
J. Am. Chem. Soc., 1957, 79, 5618-5621. [all data]
Benning, McHarness, et al., 1940
Benning, A.F.; McHarness, R.C.; Markwood, W.H., Jr.; Smith, W.J.,
Thermodynamic properties of fluorochloromethanes and -ethanes. Heat capacity of the liquid and vapor of three fluorochloromethanes and trifluorotrichloroethane,
Ind. and Eng. Chem., 1940, 32, 976-980. [all data]
Paulino and Squires, 1991
Paulino, J.A.; Squires, R.R.,
Carbene Anion Complexes - Unusual Structural and Thermochemical Features of alpha-Halocarbanions in the Gas Phase,
J. Am. Chem. Soc., 1991, 113, 5, 1845, https://doi.org/10.1021/ja00005a067
. [all data]
Dispert and Lacmann, 1978
Dispert, H.; Lacmann, K.,
Negative ion formation in collisions between potassium and fluoro- and chloromethanes: Electron affinities and bond dissociation energies,
Int. J. Mass Spectrom. Ion Phys., 1978, 28, 49. [all data]
Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B.,
Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria,
J. Am. Chem. Soc., 1984, 106, 517. [all data]
Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B.,
Gas phase negative ion chemistry of alkylchloroformates,
Can. J. Chem., 1984, 62, 675. [all data]
Edwards and Small, 1965
Edwards, J.W.; Small, P.A.,
Kinetics of the pyrolysis of chlorodifluoromethane,
Ind. Eng. Chem. Fundam., 1965, 4, 396-400. [all data]
Hess and Kemnitz, 1992
Hess, A.; Kemnitz, E.,
Heterogeneously catalyzed dismutation and conmutation reactions of CHCl3-nFnchlorofluorocarbons. A kinetic study,
Appl. Catal. A:, 1992, 82, 247-257. [all data]
Zenkevich, 2005
Zenkevich, I.G.,
Experimentally measured retention indices., 2005. [all data]
Blunden, Aneja, et al., 2005
Blunden, J.; Aneja, V.P.; Lonneman, W.A.,
Characterization of non-methane volatile organic compounds at swine facilities in eastern North Carolina,
Atm. Environ., 2005, 39, 36, 6707-6718, https://doi.org/10.1016/j.atmosenv.2005.03.053
. [all data]
Flanagan, Streete, et al., 1997
Flanagan, R.J.; Streete, P.J.; Ramsey, J.D.,
Volatile Substance Abuse, UNODC Technical Series, No 5, United Nations, Office on Drugs and Crime, Vienna International Centre, PO Box 500, A-1400 Vienna, Austria, 1997, 56, retrieved from http://www.odccp.org/pdf/technicalseries1997-01-011.pdf. [all data]
Strete, Ruprah, et al., 1992
Strete, P.J.; Ruprah, M.; Ramsey, J.D.; Flanagan, R.J.,
Detection and identification of volatile substances by headspace capillary gas chromatography to aid the diagnosis of acute poisoning,
Analyst, 1992, 117, 7, 1111-1127, https://doi.org/10.1039/an9921701111
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas Chromatography, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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