Mass spectrometric determination of dissociation energies of gaseous indium sulphides, selenides and tellurides

Abstract

The atomization energies : D^∘₀(InS)= 67.9 ± 3.5; D^∘₀(InSe)= 57.7 ± 3.5; D^∘₀(InTe)= 50.6 ± 3.5; ΔH^∘₀(In₂S)= 148.2 ± 4.0; ΔH^∘₀(In₂Se)= 132.7 ± 4.0; ΔH^∘₀(In₂Te)= 110.8 ± 4.0; ΔH^∘₀(In₂S₂)= 224.5 ± 10.0; ΔH^∘₀(In₂Se₂)= 200.5 ± 10.0; ΔH^∘₀(In₂Te₂)= 173.2 ± 10.0 and ΔH₀(InTe₂)= 107.4 ± 4.0 kcal/mole were determined. The heat of formation of In₂S₃(s) was deduced : ΔH^∘₂₉₈, ƒ(In₂S₃)=–82.8 ± 4.5 kcal/mole. The dissociation energies D^∘₀(Se₂)= 73.6 ± 2.0 and D^∘₀(Te₂)= 55.9 ± 2.0 kcal/mole were also measured.