Photochemical reductive elimination of [PtIV(NH3)4(NH2)Cl]2+: Photogeneration of hydrazine

Abstract

When [Pt-IV(NH3)(5)Cl](3+) is deprotonated the complex [Pt-IV(NH3)(4)(NH2)Cl](2+) is formed. Upon NH2- -> Pt-IV LMCT excitation (lambda(irr) > 250 nm) a reductive elimination takes place: [Pt-IV(NH3)(4)(NH2)Cl](2+) -> [Pt-II(NH3)(3)Cl](+) + N2H4 + H+. Since Pt(II) ammine complexes can be reoxidized to Pt(IV) by H2O2 it is suggested that in a cyclic process the overall reaction could proceed according to the equation: 2 NH3 + H2O2 -> N2H4 + 2 H2O. (c) 2013 Elsevier B.V. All rights reserved.