Fluorophosphine complexes of ruthenium and osmium. Part 1. Syntheses and stereochemistry of dihydrido-complexes of ruthenium(II) and osmium(II)

Abstract

The preparation of dihydrido-complexes of the type [MH₂L(PPh₃)₃] and [MH₂L₂(PPh₃)₂][L = PF₃, M = Ru or Os; L = PF₂(NMe₂), M = Ru] and [RuH₂(PF₃){PF₂(NMe₂)}(PPh₃)₂] is described. Hydrogen-1, ¹⁹F, and ³¹P n.m.r. spectroscopy has established that all these complexes are cis-dihydrides with PPh₃ ligands occupying mutually trans positions. No evidence has been found for either inter- or intra-molecular ligand-exchange processes in these systems.