Cyclopentadienyl-ruthenium and -osmium chemistry. XIII. Some complexes containing isonitrile ligands

Abstract

Reactions between isonitriles and RuCl(PPh₃)₂(η-C₅H₅) have given RuCl(CNR)(PPh₃)(η-C₅H₅)(R = Bu^t, c-C₆H₁₁, CH₂S0₂C₆H₄Me-p or C₆H₄0Me-p) and RUCl(CNBu^t)₂(η-C₅H₅); in the presence of NH₄PF₆, cationic complexes [RU(CNR)(PPh₃)₂(η-C₅H⁵)]PF₆ (R = Bu^t, c-C₆H₁₁ or CH₂SO₂C₆H₄Me-p) and [RU(CNBu^t)₂(PP~h₃)(η-C₅H₅)]PF₆ were obtained. Protonation of Ru(CN)- (PPh₃)₂(η-C₅H₅) gives the hydrogen isocyanide derivative [Ru(CNH)(PPh₃)₂(η-C₅H₅)]PF₆; tri- alkyloxonium salts alkylate the cyano complex affording [Ru(CNR)(PPh₃)₂(η-C₅H₅)]PF₆ (R = Me or Et).