Metal-sulphur Bond Enthalpy Determination of Di-n-Butyldithiocarbamate Chelates of Zinc, Cadmium and Mercury

DOI: 10.1039/DT9910001751

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1751 - 1754 (1991)

Update date:2022-08-11

Topics:

Authors:

Souza, Antonio G. de

Souza, Jose H. de

Airoldi, Claudio

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Article abstract of DOI:10.1039/DT9910001751

The standard molar enthalpies of formation of crystalline n2)2> (M = Zn, Cd or Hg), determined through reaction-solution calorimetry at 298.15 K, were found to be -471.23 +/- 3.90, -440.74 +/- 3.79 and -319.29 +/- 3.38 kJ mol^-1, respectively.The corresponding molar enthalpies of sublimation, 107 +/- 3, 123 +/- 3 and 195 +/- 3 kJ mol^-1, were estimated by means of differential scanning calorimetry.From the standard molar enthalpies of formation of the gaseous chelates, -364 +/- 5, 318 +/- 5 and -124 +/- 5 kJ mol^-1, the homolytic and heterolytic mean metal-sulphur bond enthalpies were calculated.The homolytic enthalpies decrease from zinc to mercury, while the heterolytic values are almost constant.

Full text of DOI:10.1039/DT9910001751

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