Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/99590
Type: Artigo de periódico
Title: Thioamide Adducts Of Zinc-group Chlorides-a Thermochemical Study
Author: Airoldi C.
Digiampietri E.A.
Abstract: The standard molar enthalpies ΔrH°m of the adducts of zinc-group chlorides with thioacetamide (ta) and thiobenzamide (tb) have been determined through reaction-solution calorimetry at the temperature 298.15 K: MCl2(cr) + vL(cr) = MCl2 · vL(cr); ΔrH°m/(kJ · mol-1): ZnCl2 · 2ta, -(62.09±0.33); CdCl2 · 2ta, -(45.77±0.30); HgCl2 · ta, -(61.59±0.28); ZnCl2 · 2tb, -(52.26±0.69); CdCl2 · tb, -(19.44±0.20); and HgCl2 · 2tb, -(76.81±0.09). From ΔrH°m the standard molar enthalpies of formation of the crystalline thioamide adducts were calculated; the values decrease from zinc to mercury within the ta: { -(623.2±0.9) to -(358.9±1.1)} kJ · mol-1 and tb: {-(377.0±3.1) to -(210.7±3.2)} kJ · mol-1, series. The mean metal-sulphur bond dissociation enthalpies decrease with increase of number of ligands, and are roughly of the same size as the equivalent metal-oxygen bond for zinc and cadmium. The softer behaviour of mercury favours its bonding to the sulphur donor atom. © 1992 Academic Press Limited All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/S0021-9614(05)80253-8
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0346519004&partnerID=40&md5=37d0ec96b777edad704d417c52152170
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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