Collect. Czech. Chem. Commun. 1982, 47, 2478-2483

The stoichiometry of the thermal decomposition and stereochemistry of complex compounds of the Ni(NCS)2(4-R-pyridine)4 type and their decomposition products

Miroslav Jamnický and Eugen Jóna

Department of Inorganic Chemistry, Slovak Institute of Technology, 812 37 Bratislava


The stoichiometry of the thermal decomposition of the following compounds was studied: Ni(NCS)2(4-EtPy)4 (I) (Et = ethyl, Py = pyridine), Ni(NCS)2(4-ClPy)4 (II), Ni(NCS)2(4-BrPy)4 (III), Ni(NCS)2(4-CNPy)4 (IV) and Ni(NCS)2(4-NH2Py)4 (V). In complexes I and II, the loss of the volatile ligands R-Py (on the TG curve up to 573 K) occurs in two steps (-2, -2), and in complex IV in three steps (-2; -1.4; -0.6). Decomposition of the complexes III and V is accompanied by ligand decomposition. The spectral data and magnetic moment values for all the initial complexes, together with the defined intermediates with composition Ni(NCS)2(4-RPy)2, indicated pseudooctahedral configuration.