Dimethylzinc

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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
Δfgas55.4 ± 5.9kJ/molReviewMartinho Simões 
Δfgas52.9 ± 1.3kJ/molReviewMartinho 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
Δfliquid25.0 ± 5.9kJ/molReviewMartinho SimõesMS
Δfliquid22.5 ± 1.3kJ/molReviewMartinho SimõesMS
Quantity Value Units Method Reference Comment
Δcliquid-2020.0 ± 5.9kJ/molCC-SBLong and Norrish, 1949Please also see Cox and Pilcher, 1970.; MS
Quantity Value Units Method Reference Comment
liquid201.6J/mol*KN/ASheiman, Nistratov, et al., 1984DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
129.2298.15Sheiman, Nistratov, et al., 1984T = 5 to 300 K.; 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

Dimethylzinc (l) + (Sulfuric Acid • 100Water) (solution) = 2Methane (g) + (zinc sulphate • 100Water) (solution)

By formula: C2H6Zn (l) + (H2O4S • 100H2O) (solution) = 2CH4 (g) + (O4SZn • 100H2O) (solution)

Quantity Value Units Method Reference Comment
Δr-341.8 ± 0.8kJ/molRSCCarson, Hartley, et al., 1949Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Dimethylzinc (g) = Methyl zinc (g) + Methane (g)

By formula: C2H6Zn (g) = CH3Zn (g) + CH4 (g)

Quantity Value Units Method Reference Comment
Δr266.5 ± 6.3kJ/molKinGJackson, 1989 
Δr276. to 298.kJ/molN/ASmith and Patrick, 1983 
Δr285. ± 17.kJ/molN/AMcMillen and Golden, 1982 

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 2900  C  ia 2900 S p liq. Free rotation
a1' 2 CH3 s-deform 1157  C  ia 1157 S p liq. Free rotation
a1' 3 CZn s-str 503  C  ia 503 VS p liq. Free rotation
a1 4 Torsion  ia  ia Free rotation
a2 5 CH3 s-str 2915  C 2915 S gas  ia Free rotation
a2 6 CH3 s-deform 1183  C 1183 M gas  ia Free rotation
a2 7 CZn a-str 613  C 613 gas  ia Free rotation
e' 8 CH3 d-str 2966  C 2966 S gas 2947 liq. Free rotation
e' 9 CH3 d-deform 1304  C 1301 M gas 1302 W liq. Free rotation
e' 10 CH3 rock 704  C 704 S gas Free rotation
e' 11 CZnC deform 134  D 134 sh liq. Free rotation
e 12 CH3 d-str 2843  C 2843 gas 2830 liq. Free rotation
e 13 CH3 d-deform 1434  C 1434 W liq. Free rotation
e 14 CH3 rock 620  C 620 M liq. Free rotation

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
iaInactive
shShoulder
pPolarized
C3~6 cm-1 uncertainty
D6~15 cm-1 uncertainty

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, 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]

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]

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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