Iridium nitrosyl and carbonyl complexes with 2-pyridinecarbaldehyde azines

Abstract

The reactions of the cationic iridium complexes [Ir(NO)(MeCN)₃(PPh₃)₂][PF₆]₂ and [Ir(CO)(MeCN)(PPh₃)₂][PF₆] with the binucleating ligands 2-pyridinecarbaldehyde azine (paa), 6-methyl-2-pyridinecarbaldehyde azine (mpaa), and 3,6-bis(2′-pyridyl)pyridazine (dppn) are reported. The newly synthesized compounds were characterized by elemental analysis, conductivity measurements, i.r. and n.m.r. spectroscopy. The formation of mononuclear and binuclear species and the inability to obtain mixed binuclear complexes are discussed.