Lead, tetramethyl-
- Formula: C4H12Pb
- Molecular weight: 267.3
- IUPAC Standard InChIKey: XOOGZRUBTYCLHG-UHFFFAOYSA-N
- CAS Registry Number: 75-74-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Plumbane, tetramethyl-; Tetramethyllead; Tetramethylplumbane; (CH3)4Pb; Piombo tetra-metile; Tetramethylolovo; TML
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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 | 32.5 ± 1.1 | kcal/mol | Review | Martinho Simões | Selected data |
ΔfH°gas | 40.06 ± 0.79 | kcal/mol | Review | Martinho Simões | |
ΔfH°gas | 3.2 ± 3.1 | kcal/mol | Review | Martinho Simões |
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
(g) = C3H9Pb (g) +
(g)
By formula: C4H12Pb (g) = C3H9Pb (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 55.0 to 58.1 | kcal/mol | N/A | Smith and Patrick, 1983 | |
ΔrH° | 57.0 ± 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 |
---|---|---|---|
8.50 ± 0.04 | PE | Jonas, Schweitzer, et al., 1973 | LLK |
8.8 ± 0.1 | PE | Evans, Green, et al., 1972 | LLK |
8.26 ± 0.17 | EI | Lappert, Pedley, et al., 1971 | LLK |
9.3 | EI | deRidder and Dijkstra, 1967 | RDSH |
8.0 ± 0.4 | EI | Hobrock and Kiser, 1961 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3Pb+ | 13.1 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
CH3Pb+ | 12.4 ± 0.2 | ? | EI | Hobrock and Kiser, 1961 | RDSH |
C2H6Pb+ | 12.7 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
C2H6Pb+ | 11.6 ± 0.2 | ? | EI | Hobrock and Kiser, 1961 | RDSH |
C3H9Pb+ | 8.77 ± 0.16 | CH3 | EI | Lappert, Pedley, et al., 1971 | LLK |
C3H9Pb+ | 10.1 | CH3 | EI | deRidder and Dijkstra, 1967 | RDSH |
C3H9Pb+ | 8.9 ± 0.1 | CH3 | EI | Hobrock and Kiser, 1961 | RDSH |
PbH+ | 15.3 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
Pb+ | 14.4 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
References
Go To: Top, Gas phase thermochemistry 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]
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]
Jonas, Schweitzer, et al., 1973
Jonas, A.E.; Schweitzer, G.K.; Grimm, F.A.; Carlson, T.A.,
The photoelectron spectra of the tetrafluoro and tetramethyl compounds of the group IV elements,
J. Electron Spectrosc. Relat. Phenom., 1973, 1, 29. [all data]
Evans, Green, et al., 1972
Evans, S.; Green, J.C.; Joachim, P.J.; Orchard, A.F.; Turner, D.W.; Maier, J.P.,
Electronic structures of the Group IVB tetramethyls by helium-(I) photoelectron spectroscopy,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 905. [all data]
Lappert, Pedley, et al., 1971
Lappert, M.F.; Pedley, J.B.; Simpson, J.; Spalding, T.R.,
Bonding studies of compounds of boron and the Group IV elements. VI. Mass spectrometric studies on compounds Me4M and Me3M-M'Me3 (M and M'=C, Si, Ge, Sn, and Pb): thermochemical data,
J. Organomet. Chem., 1971, 29, 195. [all data]
deRidder and Dijkstra, 1967
deRidder, J.J.; Dijkstra, G.,
Mass spectra of the tetramethyl and tetraethyl compounds of carbon, silicon, germanium, tin and lead,
Rec. Trav. Chim., 1967, 86, 737. [all data]
Hobrock and Kiser, 1961
Hobrock, B.G.; Kiser, R.W.,
Electron impact spectroscopy of tetramethylsilicon, -tin and -lead,
J. Phys. Chem., 1961, 65, 2186. [all data]
Notes
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- Symbols used in this document:
AE Appearance energy ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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