Lattice energies and thermodynamic parameters for salts having octahedral anions. Rubidium hexachlorostannate, Rb2SnCl6 and rubidium hexachlorotellurate, Rb2TeCl6

Abstract

Thermodynamic values are assigned for enthalpies of formation of the complex ions SnCl^2–₆ and TeCl^2–₆ corresponding to : ΔH^°_f(SnCl^2–₆)(g)=–1255.9 kJ mol^–1 and ΔH^°_f(TeCl^2–₆)(g)=–1020.4 kJ mol^–1 and the chloride ion affinities of gaseous SnCl₄ and TeCl₄ are assigned to be –278.4 kJ mol^–1 and –304.1 kJ mol^–1. Charge distributions derived from n.q.r. data appear consistent with the charge distributions assigned to the ions in the crystals.