Structures of cationic di-iridium complexes derived from (η5-C5Me5)Ir(CO)2, including the dication [(η5-C5Me5)(CO)2Ir–Ir(CO)2(η5-C5Me5)]2+ and the bridging methylenetetramethylcyclopentadienyl (tetramethylfulvene) complex [(η5-C5Me5)(CO)Ir–Ir;(CO)2(η5-CH2C5Me4)]+

Abstract

(η⁵-C₅Me₅)Ir(CO)₂(1) reacts with Ph₃C⁺ to give the dinuclear dication [(η⁵-C₅Me₅)(CO)₂Ir–Ir(CO)₂(η⁵-C₅Me₅)]²⁺(4) and with (η⁵-C₅Me₅)Ir(CO)Cl₂ in presence of one equivalent of Ag⁺ to give [(η⁵- C₅Me₅)(CO)(Cl)Ir–Ir(CO)₂(η⁵-C₅Me₅)]⁺(2); both (2) and (4) may be converted to the complex [(η⁵-C₅Me₅)(CO)[graphic omitted]H₂C₅Me₄)]⁺(3) containing a rare bridging methylenetetramethylcyclopentadienyl (tetramethylfulvene) ligand.