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Mass spectrometric determination of the dissociation energies of the molecules BiO, BiS, BiSe and BiTe

par Uy, Manuel O.M.;Drowart, Jean
Référence Transactions of the Faraday Society, 65, page (3221-3230)
Publication Publié, 1969

Article révisé par les pairs

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Résumé :

The dissociation energies of BiO, BiS, BiSe and BiTe were determined from equilibrium studies based on the exchange reactions Pb(g) + BiX(g) = Bi(g) + PbX(g), where X = O, S, Se or Te and from the known dissociation energies of PbO, PbS, PbSe and PbTe. The values obtained are D°0(BiO) = 338.9 ± 5.9, D°0(BiS) = 311.8 ± 4.6, D°0(BiSe) = 276.5 ± 5.9 and D°0(BiTe) = 228.5 ± 11.3 kJ mol-1. These are based on the dissociation energies of the PbX molecules which are discussed: D°0(PbO) = 374.0 ± 4.2, D°0(PbS) = 342.3 ± 1.7, D°0(PbSe) = 299.1 ± 4.2, and D°0(PbTe) = 246.1 ± 10.5 kJ mol-1. The latter two also involve a discussion of D°0(Se2) = 329.0 ± 0.3 and D°0(Te2) = 260.7 ± 0.8 kJ mol-1.