Addition of Pt(PBut3) to osmium-tin cluster complexes

Article abstract of DOI:10.1021/ic070261a

The reactions of the osmium-tin cluster complexes Os₃(CO) ₁₂(μ₃-SnPh)Ph, 9, and Os₄(CO) ₁₆(μ₄-Sn), 10, with Pt(PBu^t ₃)₂ have been investigated. Two products, PtOs ₃(CO)₁₂(Ph)(PBu^t₃)(μ₃- SnPh), 11, and Pt₂Os₃(CO)₁₂(μ₂- Ph)(PBu^t₃)₂(μ₃-SnPh), 12, were obtained from the reaction of 9 with Pt(PBu^t₃) ₂. These are mono- and bis-Pt(PBu^t₃) adducts of 9 formed by the addition of a Pt(PBu^t₃) group to the Os-Os bond in 11 and the Os-Os bond and Os-C bond to the σ-bonded phenyl group in 12. A PBu^t₃ derivative of 11, Os ₂(CO)₈(μ₃-SnPh)Os(CO)₃(PBu ^t₃)Ph, 13, was obtained by treating 12 with PBu ^t₃. The reaction of 10 with Pt(PBu^t ₃)₂ provided the bis-Pt(PBu^t₃) adduct Os₄(CO)₁₆[Pt(PBu^t₃)] ₂(μ₄-Sn), 14, that was formed by the addition of a Pt(PBut₃) group across the Os-Os bond of both Os₂(CO) ₈ groups in 10. All four new compounds 11-14 were characterized by single-crystal X-ray diffraction analysis.