Structure, bonding, and ligand-based reactions of zwitterionic boratoiridium(I) complexes with oxazolinyl scorpionate ligands
摘要:
New tris(4,4-dimethyl-2-oxazolinyl) phenylboratoiridium(I) scorpionate-type compounds [Ir(To(M))L-2] (L-2 = eta(4)-C8H12 and (CO)(2)) and electrophiles form adducts that contain a bidentate IrTo(M)-coordination and an N-electrophile interaction of the third oxazoline instead of the oxidative addition product. The adduct with lithium chloride gives a unique heterobimetallic Li-O-oxazoline-N-Ir bridging structure that has been identified through X-ray crystallography. Density functional theory calculations provide thermodynamic data, orbital symmetries, and orbital energies that explain the formation of the observed iridium( I) products. (C) 2009 Elsevier B. V. All rights reserved.