Heat of formation of pentamethylantalum and hexamethyltungsten

Abstract

Mean bond dissociation energy values, (Ta–Me)= 261 ± 6 kJ mol^–1(62 ± 2 kcal mol^–1) and (W–Me)= 159 ± 7 kJ mol^–1(38 ± 2 kcal mol^–1) have been derived from the heats of formation, ΔH_f°(TaMe₅, liq.)= 169·8 ± 26 kJ mol^–1 and ΔH^f(WMe₆, liq.)= 738·7 ± 34 kJ mol^–1, obtained from measurement of the heats of hydrolysis of solutions of TaMe₅ and WMe₆.