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|Type:||Artigo de periódico|
|Title:||A Thermochemical Study Involving Adducts Mx2·p(c6h5)3o (m = Zn, Cd, Hg; X = Br, I)|
|Abstract:||The standard molar enthalpy ΔrHm θ of the reaction: MX2(s) + 2P(C6H5)3O(s) = MX2·2P(C6H5)3O(s), where M = Zn, Cd, Hg and X = Br, I (except HgI2) was obtained through the determination of the enthalpy of dissolution of the metal halides, ligand, and adducts in calorimetric solvent, giving the values: -(69.92±1.10); -(63.02±0.39); -(16.02±0.56); -(30.55±0.87); and -(16.48±1.14) kJ·mol-1, for the sequence of halides: ZnBr2, ZnI2, CdBr2, CdI2, and HgBr2. The standard molar enthalpies of formation were also determined: -(622.2±6.8), -(495.0±6.3), -(556.2±6.5), -(457.8±7.1), and -(411.1±6.4) kJ·mol-1, for the above sequence as well as the standard enthalpies of reaction: ΔdHm θ for MX2·2P(C6H5)3O(s) = MX2(s)+2P(C6H5)3O(g); and ΔlattHm θ for MX2 · 2P(C6H5)3O(s) = MX2(g) + 2P(C6H5)3O(g). The mean enthalpy of dissociation of the metal-oxygen bond. 〈D〉(M-O), was also estimated and compared with other results. © 1986.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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