Solid state thermal phase transitions and decompositions of nickel (II) diamine complexes

Abstract

[NiL₂X₂] and [NiL₂Br₂] •2H₂O complexes (L = N, N'-dimethyl 1,2-ethanediamine and XCl⁻, SCN⁻, CF₃COO− and CCl₃COO−) have been synthesised and their TG-DTA/DSC studies have been carried out. Thermally induced-phase transition phenomena of [NiL₂X₂] (X = SCN⁻, CF₃COO⁻ and CCl₃COO⁻) are noticed and their probable mechanisms explored. Solid state synthesis of [NiLCl₂] and [NiL₂Cl₂] is achieved through pyrolysis of [NiL₂Cl₂] and [NiL₂ (OOCCCl₃)₂] respectively.