Journal of Organometallic Chemistry p. 131 - 138 (1993)
Update date:2022-08-11
Topics:
Leal, Joao Paulo
Simoes, J.A. Martinho
The standard (p0=0.1 MPa) molar enthalpies of formation of several crystalline lithium alkoxides, ΔH0f(LiOR, cr), have been determined by reaction-solution calorimetry at 298.15 K.A linear correlation has been found between ΔH0f(LiOR, cr) and ΔH0f(ROH, l) for R=n-alkyl, enabling the prediction of data for other lithium alkoxides.The deviations from the linear correlation observed for R=i-Pr and t-Bu were tentatively explained in terms of the electronegativities of the OR groups.The experimental data were also used to derive the lattice energies and the thermochemical radii of the anions OR-.The results were compared with those derived from the enthalpies of formation of the analogous sodium alkoxides, reported in a previous publication.
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