Dimethylzinc
- Formula: C2H6Zn
- Molecular weight: 95.45
- IUPAC Standard InChIKey: AXAZMDOAUQTMOW-UHFFFAOYSA-N
- CAS Registry Number: 544-97-8
- Chemical structure:
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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 | 13.2 ± 1.4 | kcal/mol | Review | Martinho Simões | |
ΔfH°gas | 12.6 ± 0.31 | kcal/mol | Review | Martinho Simões |
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 | 6.0 ± 1.4 | kcal/mol | Review | Martinho Simões | MS |
ΔfH°liquid | 5.38 ± 0.31 | kcal/mol | Review | Martinho Simões | MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -482.8 ± 1.4 | kcal/mol | CC-SB | Long and Norrish, 1949 | Please also see Cox and Pilcher, 1970.; MS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 48.18 | cal/mol*K | N/A | Sheiman, Nistratov, et al., 1984 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
30.88 | 298.15 | Sheiman, Nistratov, et al., 1984 | T = 5 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
AC - William E. Acree, Jr., James S. Chickos
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Ttriple | 230.13 | K | N/A | Sheiman, Nistratov, et al., 1984, 2 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 7.27 ± 0.05 | kcal/mol | CC-SB | Sokolovskii and Baev, 1984 | Another value for the enthalpy of vaporization has been reported: 7.05 ± 0.1 kcal/mol Long and Cattanach, 1961.; MS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
7.27 ± 0.02 | 273. to 313. | N/A | Baev, 1997 | AC |
7.15 | 283. | BG | Bamford, Levi, et al., 1946 | Based on data from 248. to 318. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.63 | 230.1 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.21 | 210.3 | Domalski and Hearing, 1996 | CAL |
7.094 | 230.1 |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.2536 | 210.26 | crystaline, II | crystaline, I | Sheiman, Nistratov, et al., 1984 | DH |
1.632 | 230.13 | crystaline, I | liquid | Sheiman, Nistratov, et al., 1984 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.21 | 210.26 | crystaline, II | crystaline, I | Sheiman, Nistratov, et al., 1984 | DH |
7.091 | 230.13 | crystaline, I | liquid | Sheiman, Nistratov, et al., 1984 | 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
(l) + (
• 100
) (solution) = 2
(g) + (
• 100
) (solution)
By formula: C2H6Zn (l) + (H2O4S • 100H2O) (solution) = 2CH4 (g) + (O4SZn • 100H2O) (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -81.7 ± 0.2 | kcal/mol | RSC | Carson, Hartley, et al., 1949 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
By formula: C2H6Zn (g) = CH3Zn (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 63.7 ± 1.5 | kcal/mol | KinG | Jackson, 1989 | |
ΔrH° | 66.0 to 71.2 | kcal/mol | N/A | Smith and Patrick, 1983 | |
ΔrH° | 68.0 ± 4.0 | kcal/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 |
---|---|---|---|
9.00 ± 0.02 | PI | Distefano and Dibeler, 1970 | RDSH |
8.86 ± 0.15 | EI | Winters and Kiser, 1967 | RDSH |
9.4 | PE | Creber and Bancroft, 1980 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3+ | 15.1 ± 0.5 | ? | EI | Winters and Kiser, 1967 | RDSH |
CH3Zn+ | 10.22 ± 0.02 | CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
CH3Zn+ | 11.2 ± 0.2 | CH3 | EI | Winters and Kiser, 1967 | RDSH |
ZnH+ | 13.9 ± 0.4 | ? | EI | Winters and Kiser, 1967 | RDSH |
Zn+ | 13.13 ± 0.02 | 2CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
Zn+ | 13.4 ± 0.3 | 2CH3 | EI | Winters and Kiser, 1967 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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]
Sheiman, Nistratov, et al., 1984
Sheiman, M.S.; Nistratov, V.P.; Kamelova, G.P.; Rabinovich, I.B.,
Low-temperature heat capacity of organic compounds of aluminum and zinc, Probl. Kalorim. Khim. Termodin., Dokl. Vses. Konf.,
10th, 1984, 2, 457-459. [all data]
Sheiman, Nistratov, et al., 1984, 2
Sheiman, M.S.; Nistratov, V.P.; Kamelova, G.P.; Rabinovich, I.B.,
Low-temperature heat capacity of organic compounds of aluminum and zinc
in Probl. Kalorim. Khim. Termodin., Dokl. Vses. Konf., 10th, Akad. Nauk SSSS Inst. Khim. Fiz.: Chernogolovka, USSR, Vol. 2 2, 1984. [all data]
Sokolovskii and Baev, 1984
Sokolovskii, A.E.; Baev, A.K.,
Zh. Obshch. Khim., 1984, 54, 103. [all data]
Long and Cattanach, 1961
Long, L.H.; Cattanach, J.,
J. Inorg. Nucl. Chem., 1961, 20, 340. [all data]
Baev, 1997
Baev, A.K.,
Thermodynamic study of structural changes in solutions of dimethyl-zinc with methyl compounds of Group VIB elements,
Zh. Neorg. Khim., 1997, 42, 4, 662. [all data]
Bamford, Levi, et al., 1946
Bamford, C.H.; Levi, D.L.; Newitt, D.M.,
91. Physical and chemical properties of organo-metallic compounds. Part I. The vapour pressures and freezing points of simple metal alkyls of Groups II, III, and V,
J. Chem. Soc., 1946, 468, https://doi.org/10.1039/jr9460000468
. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Carson, Hartley, et al., 1949
Carson, A.S.; Hartley, K.; Skinner, H.A.,
Thermochemistry of metal alkyls. Part II.?The bond dissociation energies of some Zn?C and Cd?C bonds, and of Et?I.,
Trans. Faraday Soc., 1949, 45, 1159, https://doi.org/10.1039/tf9494501159
. [all data]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [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]
Winters and Kiser, 1967
Winters, R.E.; Kiser, R.W.,
Ionization and fragmentation of dimethylzinc, trimethylaluminum, and trimethylantimony,
J. Organometal. Chem., 1967, 10, 7. [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]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References
- 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°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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