Issue 7, 1981
From the journal:

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases

Enthalpies of formation of hexakis(isopropoxy)-dimolybdenum and octakis-(isopropoxy)-dimolybdenum and the metal–metal bond enthalpy contributions

Kingsley J. Cavell,   Joseph A. Connor,   Geoffrey Pilcher,   Manual A. V. Ribeiro da Silva,   Maria D. M. C. Ribeiro da Silva,   Henry A. Skinner,   Yogesh Virmani  and  Mohamed T. Zafarani-Moattar  

Abstract

Standard enthalpies of formation of crystalline samples at 298.15 K were determined by solution calorimetry (oxidative hydrolysis), for, ΔHf⊖[Mo2(OPri)6,c]=–(1661.8 ± 9) kJ mol–1 and ΔHf⊖[Mo2(OPri)8,c]=–(2292.5 ± 10) kJ mol–1.

The dissociation process, [Mo2(OPri)8, g]→ 2 Mo(OPri)4, g is calculated to be endothermic, ΔH≈ 184 kJ mol–1.

A bond-enthalpy/bond-length curve is tentatively proposed for Mo—Mo bonds. A similar curve for Mo—O bonds is given, to fit the limited thermochemical data available. It is concluded that the Mo[double bond, length half m-dash]Mo bond in Mo2(OPri)8 contributes ca. 200–230 kJ mol–1 to the binding in this molecule.

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Article information

DOI
https://doi.org/10.1039/F19817701585
Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1981,77, 1585-1594

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Enthalpies of formation of hexakis(isopropoxy)-dimolybdenum and octakis-(isopropoxy)-dimolybdenum and the metal–metal bond enthalpy contributions

K. J. Cavell, J. A. Connor, G. Pilcher, M. A. V. R. da Silva, M. D. M. C. R. da Silva, H. A. Skinner, Y. Virmani and M. T. Zafarani-Moattar, J. Chem. Soc., Faraday Trans. 1, 1981, 77, 1585 DOI: 10.1039/F19817701585

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