First η1-ligated 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene complexes and the remarkable trihydration reaction of trans-[PtCl2(PMe3)(P3C3But3)] to cis-[PtCl(PMe3)(P3O3C3H5But3)], containing the novel CH(But)PH(O)C(But)PH(O)CH(But)P(O) ring system

Abstract

The first examples of η¹-complexes of 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene are described, namely trans-[PtCl₂(PR₃)(P₃C₃Bu^t₃)] (PR₃ = PMe₃, PEt₃, PMe₂Ph or PMePh₂) and their structures established by ³¹P and ¹⁹⁵Pt NMR spectroscopy. The unusual molecular structure of cis-[PtCl(PMe₃)(P₃O₃C₃H₅Bu^t₃)], containing the novel CH- (Bu^t)PH(O)C(Bu^t)PH(O)CH(Bu^t)P(O) ring system, which is formed by the trihydration of trans-[PtCl₂(PMe₃)(P₃- C₃Bu^t₃)] is also reported.