Diprotonation of binuclear platinum(0) complexes to give two new structural forms of binuclear platinum hydrides, [Pt2H2(µ-R2PCH2PR2)3]2+: the molecular structure of the complex with R = Et

Abstract

Protonation of [Pt₂(µ-R₂PCH₂PR₂)₃(PPh₃)_n](n= 0, R = Ph or Et; n= 1, R = Me; n= 2, R = EtO) with NH₄[PF₆] gives the diplatinum(I) complex [Pt₂H(η¹-dppm)(µ-dppm)₂]⁺, (2), when R = Ph (dppm = Ph₂PCH₂PPh₂), but the diplatinum(II) complexes [Pt₂H₂(µ-R₂PCH₂PR₂)₃]²⁺, in structural forms (3), R = EtO, or (4), R = Me, Et, when the substituents on phosphorus are smaller; the structure of (4), R = Et, has been determined crystallographically.