Abstract

Abstract [NiL3]Cl2·H2O, [NiL2(H2O)2]Br2, and [NiL2(NCS)2] (L=1,4-butanediamine) have been synthesized and their thermal investigations have been carried out. [Ni2L3Cl4], [NiLCl2], [Ni4L3Br8], and [NiL(NCS)2] have been synthesized pyrolytically in solid phase by temperature arrest technique from their corresponding parent diamine complexes. All the parent tris and bis(diamine) complexes possess Oh geometry. [NiLCl2 possesses Td geometry, whereas, [NiL(NCS)2] possesses Oh though 1,4-butanediamine is chelated in both of these mono(diamine) complexes. Thiocyanate is found to be bridged in [NiL(NCS)2]. The probable mechanistic paths of decomposition of these diamine complexes have been propsoed.

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