Phenyl Substituted ditelluro-imidodiphosphinate complexes of iron, nickel, palladium and platinum, and their pyrolysis Studies Generating metal tellurides

Abstract

The tellurium complexes M[N(PPh2Te)2]n (M = Fe (1), Ni (2), Pd (3), Pt (4) and n = 2 or 3) have been prepared using the ditellurido anions [N(PPh2Te)2] and their ability to generate tellurides was investigated by pyrolysis in a quartz glass tube, under vacuum at 500 C for 90 min. The products were characterised by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive analysis of Xrays (EDAX) and X-ray photoelectron spectroscopy (XPS). The XRD revealed an orthorhombic phase for the metal telluride from 1, while the hexagonal phase was observed for tellurides from 2, 3 and 4 respectively. Magnetic measurements on FeTe2 (from 1) indicated an antiferromagnetic sample with a transition temperature at 75 K.