Enthalpies of formation of Ti(η-C5H5)2(OR)2 complexes (R C6H5, 2-CH3C6H4, 3-CH3CH6H4 4-CH3C6H4, and 2-ClC6H4)
1981; Elsevier BV; Volume: 222; Issue: 1 Linguagem: Inglês
10.1016/s0022-328x(00)89016-6
ISSN1872-8561
AutoresAlberto R. Dias, Margarida S. Salema, José A. Martinho Simões,
Tópico(s)Phase Equilibria and Thermodynamics
ResumoThe standard enthalpies of formation of the title crystalline complexes at 298.15 K have been determined by reaction-solution calorimetry. The results give ΔHof[Ti(η-C5H5)2(OC6H5)2,c] −379.2 ± 8.0, ΔHof[Ti(η-C5H5)2(2-CH3-C6H4O)2,c] −416.7 ± 8.1, ΔHof[Ti(η-C5H5)2(3-CH3C6H4O)2,c] −393.6 ± 8.1, ΔHof[Ti(ηC5H5)2(4-CH3C6H4O)2,c] −416.5 ± 7.8 and ΔHof[Ti(η-C5H5)2 (2-ClC6H4O2,c] −407.6 ± 21.5 kJ mol-1. The metal—oxygen bond strenghts have been evaluated as mean bond-disruption enthalpies (D) and as mean bond-enthalpy terms (E). The method of calculation of these values is analysed and earlier relevant thermochemical data are reviewed.
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