Synthesis, spectroscopy, and theoretical studies of platinum(ii) phosphate complexes

Abstract

A method for the synthesis of [Pt(dpp)₂(en)] (dpp = diphenyl phosphato, en = ethane-1,2-diamine) is reported, and the resulting complex characterised spectroscopically. The synthesis involves displacement of chloride ligands using silver(I), and requires non-aqueous media. Density functional studies suggest typical square-planar coordination geometry, with rather weak Pt–O bonds and very strong N–H⋯O hydrogen bonds. Comparison with model complexes suggests that phosphates are weaker ligands to platinum(II) than nitrates, and are therefore likely to be highly reactive.