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

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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.