dimethylcadmium
- Formula: C2H6Cd
- Molecular weight: 142.480
- CAS Registry Number: 506-82-1
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Gas 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: José A. Martinho Simões
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 123. ± 12. | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | 102.2 ± 4.2 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | 104.8 ± 1.3 | kJ/mol | Review | Martinho Simões | Selected data. |
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 as indicated in comments:
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | 65.1 ± 4.2 | kJ/mol | Review | Martinho Simões | MS |
ΔfH°liquid | 67.7 ± 1.3 | kJ/mol | Review | Martinho Simões | Selected data.; MS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 201.88 | J/mol*K | N/A | N/A | DH |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°solid | 86. ± 12. | kJ/mol | Review | Martinho Simões | MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -1989. ± 12. | kJ/mol | CC-SB | Long and Norrish, 1949 | Please also see Cox and Pilcher, 1970.; MS |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
132.01 | 298.15 | N/A | T = 15 to 300 K.; DH |
Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Ttriple | 270.48 | K | N/A | N/A | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 37.1 ± 0.1 | kJ/mol | RSC | Sokolovskii and Baev, 1985 | MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 37.1 ± 0.1 | kJ/mol | CC-SB | Sokolovskii and Baev, 1985 | MS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
38.296 | 291.5 | N/A | P = 3.033 kPa; DH |
37.1 ± 0.1 | 324. | Sokolovski and Baev, 1985 | Based on data from 271. to 378. K. See also Baev, 2001.; AC |
38.9 | 282. | N/A | Based on data from 270. to 295. K.; AC |
Entropy of vaporization
ΔvapS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
131.4 | 291.5 | N/A | P; DH |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
7.84 | 270.5 | N/A | AC |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.5209 | 254.35 | crystaline, II | crystaline, I | N/A | DH |
7.837 | 270.48 | crystaline, I | liquid | N/A | DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
5.98 | 254.35 | crystaline, II | crystaline, I | N/A | DH |
28.97 | 270.48 | crystaline, I | liquid | N/A | DH |
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 by: José A. Martinho Simões
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
C2H6Cd (g) = CH3Cd (g) + (g)
By formula: C2H6Cd (g) = CH3Cd (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 234.3 ± 6.3 | kJ/mol | KinG | Jackson, 1989 | |
ΔrH° | 243. to 255. | kJ/mol | N/A | Smith and Patrick, 1983 | |
ΔrH° | 251. ± 17. | kJ/mol | N/A | McMillen and Golden, 1982 |
Gas phase ion energetics 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.56 ± 0.02 | PI | Distefano and Dibeler, 1970 | RDSH |
8.8 | PE | Creber and Bancroft, 1980 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3Cd+ | 9.69 ± 0.02 | CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
Cd+ | 12.10 ± 0.02 | 2CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
Vibrational and/or electronic energy levels
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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: Takehiko Shimanouchi
Symmetry: D3h'(G+36) Symmetry Number σ = 6
Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
---|---|---|---|---|---|---|---|---|---|---|
Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
a1' | 1 | CH3 s-str | 2903 | C | ia | 2903 S p | liq. | Free rotation | ||
a1' | 2 | CH3 s-deform | 1127 | C | ia | 1127 S p | liq. | Free rotation | ||
a1' | 3 | CCd s-str | 459 | C | ia | 459 S p | liq. | Free rotation | ||
a1 | 4 | Torsion | ia | ia | Free rotation | |||||
a2 | 5 | CH3 s-str | 2923 | C | 2923 S | gas | ia | Free rotation | ||
a2 | 6 | CH3 s-deform | 1136 | C | 1136 M | gas | ia | Free rotation | ||
a2 | 7 | CCd a-str | 535 | C | 535 S | gas | ia | Free rotation | ||
e' | 8 | CH3 d-str | 2980 | C | 2980 VS | gas | Free rotation | |||
e' | 9 | CH3 d-deform | 1315 | C | 1315 | gas | 1324 | liq. | Free rotation | |
e' | 10 | CH3 rock | 700 | C | 700 S | gas | Free rotation | |||
e' | 11 | CCdC deform | 124 | C | 124 W | gas | 120 W b | liq. | Free rotation | |
e | 12 | CH3 d-str | 2859 | C | 2859 | gas | 2834 M | liq. | Free rotation | |
e | 13 | CH3 d-deform | 1427 | C | 1427 W | liq. | Free rotation | |||
e | 14 | CH3 rock | 634 | C | 634 M dp | liq. | Free rotation | |||
Source: Shimanouchi, 1972
Notes
VS | Very strong |
S | Strong |
M | Medium |
W | Weak |
ia | Inactive |
b | Broad |
p | Polarized |
dp | Depolarized |
C | 3~6 cm-1 uncertainty |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, NIST Subscription Links, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Martinho Simões
Martinho Simões, J.A.,
Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]
Long and Norrish, 1949
Long, L.H.; Norrish, R.G.W.,
Phil. Trans. Roy. Soc. (London), 1949, A241, 587. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds
in Academic Press, New York, 1970. [all data]
Sokolovskii and Baev, 1985
Sokolovskii, A.E.; Baev, A.K.,
Vestsi Akad. Navuk BSSR, Ser. Khim. Navuk, 1985, 112.. [all data]
Sokolovski and Baev, 1985
Sokolovski, A.E.; Baev, A.K.,
Vestsi Akad. G. Emii Navuk BSSR Ser. Khim. Navuk, 1985, 1112. [all data]
Baev, 2001
Baev, A.K.,
Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 2001, 44, 1, 3. [all data]
Jackson, 1989
Jackson, R.L.,
Chem. Phys. Lett., 1989, 163, 315. [all data]
Smith and Patrick, 1983
Smith, G.P.; Patrick, R.,
Int. J. Chem. Kinet., 1983, 15, 167. [all data]
McMillen and Golden, 1982
McMillen, D.F.; Golden, D.M.,
Hydrocarbon bond dissociation energies,
Ann. Rev. Phys. Chem., 1982, 33, 493. [all data]
Distefano and Dibeler, 1970
Distefano, G.; Dibeler, V.H.,
Photoionization study of the dimethyl compounds of zinc, cadmium, and mercury,
Intern. J. Mass Spectrom. Ion Phys., 1970, 4, 59. [all data]
Creber and Bancroft, 1980
Creber, D.K.; Bancroft, G.M.,
Photoelectron studies of dialkyl group 2B compounds: Ligand field splittings intensity variations with photon energy,
Inorg. Chem., 1980, 19, 643. [all data]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume II,
J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [all data]
Notes
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- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔrH° Enthalpy of reaction at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ΔvapS Entropy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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