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Standard enthalpies of formation of crystalline dimethylammoniumdimethyldithiocarbamate and of dimethyldithiocarbamate complexes of copper(II) and nickel(II). The mean Cu-S and Ni-S bond-dissociation enthalpies

✍ Scribed by Manuel A.V. Ribeiro da Silva; Ana M.M.V. Reis; Rita I.M.C.P. Faria

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 329 KB
Volume: 27
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1995.0146

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✦ Synopsis

The standard (p°= 0.1 MPa) enthalpies of formation of crystalline dimethylammoniumdimethyldithiocarbamate and of the dimethyldithiocarbamate complexes of Ni(II) and Cu(II) were determined, at the temperature 298.15 K, by solution-reaction calorimetry. The enthalpy of ''decomposition'' of the dimethylammoniumdimethyldithiocarbamate salt and the enthalpies of sublimation of the metal complexes were measured by high-temperature microcalorimetry. From these values, the mean molar bond-dissociation enthalpies Dm (M-S) were derived.

DfH°m(cr)/(kJ•mol

-1 ) Dm (M-S)/(kJ•mol -1 ) (CH3)2NH2S2CN(CH3)2 -144.026.4 -Ni{S2CN(CH3)2}2 -146.1210.9 22224 Cu{S2CN(CH3)2}2 -85.5211.0 18324

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