Some new iridium complexes derived from chlorotricarbonyliridium

Abstract

Reactions of [Ir(CO)₃Cl]_n with chelating agents L–L (L–L = Ph₂PCH₂CH₂PPh₂ or Ph₂AsCH₂CH₂AsPh₂) to give Ir(CO)₂(L–L)Cl complexes are reported. Complexes of the type [lr(CO)₂LCl]_n(L = SEt₂, SeEt₂, or TeEt₂) have also been isolated by making [Ir(CO)₃Cl]_n react with ligands containing Group VIB donor atoms. Oxidative addition reactions on the cationic four-co-ordinated [Ir(CO)₂(Ph₂AsCH₂AsPh₂)]⁺ are included and discussed according to the σ-donor ability of the co-ordinated ligands and the positive charge of the complex. The i.r. spectral properties of the complexes are discussed.