germanium(4+) ethanolate

Formula: C₈H₂₀GeO₄
Molecular weight: 252.88
CAS Registry Number: 14165-55-0
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Other data available:
- Condensed phase thermochemistry data
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Gas phase thermochemistry data

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Data compiled by: José A. Martinho Simões

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-965.6 ± 3.1	kJ/mol	Review	Martinho Simões	The enthalpy of formation has been derived on the basis of GeO2(am).

Phase change data

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Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
MS - José A. Martinho Simões

Quantity	Value	Units	Method	Reference	Comment
Δ_vapH°	56.7	kJ/mol	N/A	Pangrác, Fulem, et al., 2008	Based on data from 259. to 303. K.; AC
Δ_vapH°	43.1 ± 0.4	kJ/mol	CC-SB	Shaulov, Fedorov, et al., 1970	Another value for the enthalpy of vaporization has been reported: 53.9 ± 0.3 kJ/mol Grinberg, Chernaya, et al., 1988.; MS

Enthalpy of vaporization

Δ_vapH (kJ/mol)	Temperature (K)	Reference	Comment
53.9	389.	Grinberg, Chernaya, et al., 1988, 2	See also Pangrác, Fulem, et al., 2008.; AC
53.6	406.	Balanevskaya, Rudnev, et al., 1977	See also Pangrác, Fulem, et al., 2008.; AC
47.9	371.	Bradley, Kay, et al., 1958	Based on data from 328. to 414. K.; AC
46.6	403.	Johnson and Fritz, 1953	See also Pangrác, Fulem, et al., 2008.; AC

References

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Martinho Simões
Martinho Simões, J.A., Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]

Pangrác, Fulem, et al., 2008
Pangrác, J.; Fulem, M.; Hulicius, E.; Melichar, K.; Simecek, T.; Ruzicka, K.; Morávek, P.; Ruzicka, V.; Rushworth, S.A., Vapor pressure of germanium precursors, Journal of Crystal Growth, 2008, 310, 23, 4720-4723, https://doi.org/10.1016/j.jcrysgro.2008.06.063 . [all data]

Shaulov, Fedorov, et al., 1970
Shaulov, Yu.Kh.; Fedorov, A.K.; Zueva, G.Ya.; Borisyuk, G.V.; Genchel, V.G., Russ. J. Phys. Chem., 1970, 44, 1181. [all data]

Grinberg, Chernaya, et al., 1988
Grinberg, E.E.; Chernaya, N.G.; Efremov, A.A., Vysokochist. Veshchestva, 1988, 180.. [all data]

Grinberg, Chernaya, et al., 1988, 2
Grinberg, E.E.; Chernaya, N.G.; Efremov, A.A., Physicochemical properties of some Group III-V element alcoholates, Vysokochist. Veshchestva, 1988, 3, 180. [all data]

Balanevskaya, Rudnev, et al., 1977
Balanevskaya, T.S.; Rudnev, V.V.; Klishina, N.G.; Efremov, A.A., Tr. VNII Khim. Reakt. Osobo Chist. Khim. Veshehestv, 1977, 98. [all data]

Bradley, Kay, et al., 1958
Bradley, D.C.; Kay, L.J.; Swanwick, J.D.; Wardlaw, W., 732. Germanium esters. Part II. Intermolecular forces and liquid structure, J. Chem. Soc., 1958, 3656, https://doi.org/10.1039/jr9580003656 . [all data]

Johnson and Fritz, 1953
Johnson, Otto H.; Fritz, H.E., Tetraalkoxygermanes ¹, J. Am. Chem. Soc., 1953, 75, 3, 718-720, https://doi.org/10.1021/ja01099a061 . [all data]

Notes

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Symbols used in this document:

Δ_fH°_gas Enthalpy of formation of gas at standard conditions

Δ_vapH Enthalpy of vaporization

Δ_vapH° Enthalpy of vaporization at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_vapH	Enthalpy of vaporization
Δ_vapH°	Enthalpy of vaporization at standard conditions