Five- and six-coordinate ruthenium complexes with the tridentate orthometallated aryl bisphosphine ligand [2,6-(Ph 2PCH 2) 2C 6H 3] −

Abstract

A series of ruthenium complexes with the orthometallated ligand [2,6-(Ph 2PCH 2) 2C 6H 3] − (PCP) was synthesized. Reaction of RuCl 2(PPh 3) 3 with 1,3-(Ph 2PCH 2) 2C 6H 4 produced the coordinatively unsaturated complex RuCl(PPh 3)(PCP), which was characterized by X-ray crystallography. Treatment of RuCl(PPh 3)(PCP) with 4-phenylpyridine (pyph) yielded RuCl(pyph)(PPh 3)(PCP). Treatment of RuCl(PPh 3)(PCP) with PMe 3 and CO generated RuCl(PMe 3) 2(PCP) and RuCl(CO) 2(PCP) respectively. Reactions of RuCl(PPh 3)(PCP) with NaH in THF and NaBH 4 in methanol gave RuH(PPh 3)(PCP) and RuH(CO)(PPh 3)(PCP) respectively. The hydride complex RuH(PMe 3) 2(PCP) was prepared by the reaction of RuCl(PMe 3) 2(PCP) with NaBH 4.