The heat of formation of crystalline tetramic tri-isopropoxyaluminium has been derived. ΔHt°[Al(OPrf)3]4(c)=–5149·5 kJ mol–1. From this the heat of formation of the gaseous dimer ΔHt°[Al(OPri)3]2(g)=–2446·9 kJ mol–1 has been calculated. This leads to a minimum value for the Al–O bridge bond ΔHhet=+131·5 kJ mol–1.
J. W. Wilson, J. Chem. Soc. A, 1971, 981 DOI: 10.1039/J19710000981
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