Carbodithioato derivatives of weak nitrogenous nucleophiles. III

Katsoulos, G.A.; Tossidis, I. A.; Sigalas, Michael P.; Hadjikostas, C. C.; Diemann, E.

doi:10.1016/0040-6031(90)80047-3

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…Moreover, the activation energies for the decomposition of nickel(II) N-alkyldithiocarbamates were found to 9 be comparable with the values previously reported for the square-planar d 8 metal(II) dithio complexes [7,18]. These values are also comparable with the values generally observed for four-coordinated transition metal complexes [19].…”

Section: Decomposition Kineticssupporting

confidence: 86%

Kinetic analysis of thermogravimetric data on some nickel(II) N-alkyldithiocarbamates

Lalia‐Kantouri

Katsoulos

Hadjikostas

et al. 1989

Journal of Thermal Analysis

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Thermogravimetric and derivative thermogravimetric curves of some complexes [Ni(S2CNHR)2] (R = Me, Et, Pr i, Bu i, Bu t, Bz, p:MePh, p-MeOPh, p-C1Ph, p-NO2Ph) in a dynamic nitrogen atmosphere were studied to determine their modes of decomposition. All these complexes show similar TG profiles. The weight losses in the main decomposition stages indicate conversion of the nickel(II) dithiocarbamates to sulphide. Reaction orders were estimated via the shape characteristics of the corresponding derivative thermogravimetric curves and kinetic analysis of the thermogravimetric data was performed by using the Coats-Redfern and Horowitz-Metzger methods.Dithiocarbamates constitute a class of organo-sulphur compounds with strong binding properties, which are also known to have profound effects on biological systems [1]. Interest in the study of metal dithiocarbamato complexes has been stimulated by their use in industry as vulcanization accelerators and as highpressure lubricants, whereas their use as fungicides and pesticides has induced a vast number of biological and biochemical investigations [2]. In this respect, several d 8 metal complexes of aliphatic and aromatic dithiocarbamates have already been studied in our laboratory in an attempt to establish the chemical and electronic properties of the various coordination geometries obtainable within the dithio-acid system [3 6]. One logical extension of this work was to study the thermal decomposition of bis(N-monosubstituted-dithiocarbamato)metal(II) complexes, [M(S2CNHR)2] (M = Ni, Pd, Pt), as a literature survey revealed that little work has been carried out on thermal studies of metal(II) N-alkyldithiocarbamates [7]. To this end, thermoanalytical data (TG and DTG) on some typical square-planar Ni(II) dithiocarbamates with substituents displaying various electronic effects are reported in the present paper. Moreover, an interpretation and numerical analysis of these data is attempted, since thermogravimetric analysis is an important method John W~ile.l~ & Sons, Limited, Chichester Akad~miai Kiad6; Budapest

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Section: Decomposition Kineticssupporting

confidence: 86%