Chemistry of the metal carbonyls. Part LXIV. New cluster carbonyl compounds containing platinum and either ruthenium or osmium

Abstract

Reactions between dodecacarbonyltriruthenium and low-valent platinum complexes containing tertiary phosphine, phosphite, or arsine ligands afford complexes RuPt₂(CO)₅L₃[L = PPh₃, PPh₂Me, PPhMe₂, PPh(OMe)₂, or AsPh₃], Ru₂Pt(CO)₇L₃(L = PPhMe₂), Ru₂Pt(CO)₈(diphos), and RuPt₂(CO)₄L₄[L = PPh(OMe)₂ or P(OPh)₃]. These reactions are also a good source of the complexes Ru₃(CO)_12–nL_n(n= 1, 2, or 3). The analogous complexes Os₃(CO)_12–nL_n were the only products from reactions between Os₃(CO)₁₂ and Pt(PMePh₂)₄ or Pt(PPh₃)₂(trans-stilbene). However, the use of cis-H₂Os(CO)₄ in place of the osmium carbonyl enabled the cluster compounds OsPt₂(CO)₅L₃(L = PPh₃ or PMePh₂) and Os₂Pt(CO)₇(PMePh₂)₃ to be isolated. i.r. and ¹H n.m.r. spectra for these compounds are discussed, are discussed, and likely structures are considered.