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Type: Artigo de periódico
Title: Enthalpy Of Sublimation Of Adducts-an Evaluation Involving Mx2·nl (m = Zn, Cd, Hg; X = Cl, Br, I; N = 1, 2, 3; L = Organic Base Containing Co Or Po Groups) Adducts
Author: Pereira Chagas A.
Airoldi C.
Abstract: The approximation that the molar enthalpy of sublimation of an adduct is equal to the molar enthalpy of sublimation or vaporization of the ligand, has been applied to the calculation of the mean enthalpy of dissociation of the metal-ligand bond, D(MO), for adducts of the type MX2·nL (M = Zn, Cd, Hg; X = Cl, Br, I; n = 1, 2, 3; L = ligand containing PO or CO groups) and for other similar compounds. Based on a thermochemical cycle, a linear equation D(MO) = AΔrH(a) + B was obtained, with A = 1/n and ΔrH(a) derived from the enthalpy of the reaction MX2·nL(s) = MX2(g)+nL(g), whose thermochemical value was calculated from experimental data. By using data from nearly 80 compounds and calculating D(MO) for various approximations, it was verified through linear regression that the cited approximation is the one which correlates the best with the stoichiometries of the compounds. This result is a good argument for the use of this approximation in D(MO) calculations. © 1989.
Rights: fechado
Identifier DOI: 10.1016/S0277-5387(00)81124-9
Date Issue: 1989
Appears in Collections:Unicamp - Artigos e Outros Documentos

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