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Thermochemical Properties of Palladium(II) Chelates Involving Dialkyldithiocarbamates
Authors:Botelho  J. R.  Souza  A. G.  Nunes  L. M.  Chagas  A. P.  Garcia dos Santos  I. M.  da Conceição  M. M.  Dunstan  P. O.
Affiliation:1.Departamento de Química, CCEN, Universidade Federal da Paraíba, 58059-900, Jo?o Pessoa, Paraíba, Brazil
;2.Instituto de Quiacute;mica, Universidade Estadual de Campinas, 13083-970, Campinas, S?o Paulo, Brazil
;
Abstract:The standard molar enthalpies of formation of crystalline dialkyldithiocarbamates chelates, [Pd(S2CNR2)2], with R=C2H5, n-C3H7, n-C4H9 and i-C4H9, were determined through reaction-solution calorimetry in acetone, at 298.15 K. From the standard molar enthalpies of formation of the gaseous chelates, the homolytic (172.4±3.8, 182.5±3.2,150.9±3.1 and 162.6±3.1 kJ mol−1) and heterolytic (745.0±3.8, 803.7±3.3,834.3±3.1 and 735.2±3.0 kJ mol−1) mean palladium-sulphur bond-dissociation enthalpies were calculated. This revised version was published online in July 2006 with corrections to the Cover Date.
Keywords:calorimetry  dialkyldithiocarbamates  enthalpies  palladium
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