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Heterogeneous reactions of solid nickel(II) complexes. X. Study of stoichiometry of thermal decomposition of isothiocyanatonickel(II) complexes with some alkylamines

E. Jóna, B. Vojtas, and T. Šramko

Department of Inorganic Chemistry, Slovak Technical University, 880 37 Bratislava

 

Abstract:   The stoichiometry of thermal decomposition of isothiocyanatonickel(II) complexes with some alkylamines was studied by means of thermoanalytical methods. It has been found that the complex Ni(NCS)2(methylamine)4 (I) decomposes in three steps (-2,-1, -1), Ni(NCS)2(ethylamine)4 (II) in two steps (-2, -2), and both isomeric forms (pseudooctahedral and square-planar) of the complex Ni(NCS)2(diethylamine)2 (VI) and (V) in one step ( -2). For complex / the diffraction and spectral analyses (the i.r.) also evidenced the existence of the intermediate Ni(NCS)2(methylamine)v It was stated that the more-step release of volatile ligands for complexes I and II is not connected with a stereochemical change in the course of the thermal decomposition (no change of the shape of the coordination polyhedron occurs), but rather with fine differences in their crystal structure (e.g. mutual interactions of structure units in the crystal).

Full paper in Portable Document Format: 301a107.pdf

 

Chemical Papers 30 (1) 107–113 (1976)

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