An optically pure P–alkene‐ligated IrI complex

The asymmetric unit of (P)‐chloridobis(S)‐(+)‐5‐(3,5‐dioxa‐4‐phosphacyclohepta2,1‐a:3,4‐a′]dinaphthalen‐4‐yl)dibenzb,f]azepine]iridium(I)–benzene–pentane (1/1/1), IrCl(C₃₄H₂₂NO₂P)₂]·C₆H₆·C₅H₁₂, contains two formula units. The two symmetry‐independent molecules of the Ir complex have similar conformations and approximate C₂ symmetry, with small deviations arising from slightly different puckering of the seven‐membered dioxaphosphacycloheptadiene rings. The Ir atoms have trigonal–bipyramidal coordination geometry, with the P atoms in axial positions. The steric strain of the bidentate coordination of the P–alkene ligand through its P and alkene C atoms causes the N atom to have pyramidal geometry, compared with the trigonal–planar geometry observed in the free ligand. The coordination also results in an anti conformation of the binaphthyl and alkene groups within the P–alkene ligand.