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

Abstract

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.