Preparation of hydrido η6-hexamethylbenzene complexes of Ruthenium(II) Containing Various Tertiary Phosphines. Displacement of Coordinated Triphenylarsine or Triphenylstibine from RuHCl(η6-C6Me6)L (L = AsPh3, SbPh3)

Abstract

Twelve new complexes in the series RuHCl(η6-C6Me6)L [L = PBut2Me (5), PBut2Et (6), PBut2Pr (7), PMe3 (8), PMe2Ph (9), PMePh2 (10), PEtPh2 (11), PPh2Pr (12), P(OPh)3 (13), P(OMe)3 (14), PEt3 (15), or PPh2(C6H4Me-o) (16)] have been prepared by one of three methods: 1, heating [RuHCl(η6-C6Me6)]2 with an excess of L and of anhydrous Na2CO3 in propan-2-ol (5)-(7); 2, heating pre-formed RuHCl(η6-C6Me6)L with an excess of Na2C03 in propan-2-ol (8), (9), (11); 3, displacement of AsPh3 or SbPh3 by L from RuHCl(η6-C6Me6)L (L = AsPh3, SbPh3) (10)-(16). The new dihydrido complexes RuHCl(η6-C6Me6)L (17)-(19) have been made by NaBH4 reduction of either RuHCl(η6-C6Me6)L [L = PMe2Ph (17), PButMe2 (18)] or of RuHCl(η6-C6Me6)L [L = PBut2Et (19)]. Under the conditions of method 2, RuHCl(η6-C6Me6)(PPh7(C6H4Me-o)) (4) undergoes deprotonation at the o-tolyl methyl group to give the cyclometallated complex RuCl(CH2C6H4PPh2-o)(η6-C6Me6) (20). Show more