Methoxycarbene and Allenylidene Complexes of
Ruthenium with an Oxygen Tripod Ligand

Leung, Wa-Hung; Chan, Eddie Y. Y.; Wong, Wing-Tak

doi:10.1021/om970907e.s001

Methoxycarbene and Allenylidene Complexes of Ruthenium with an Oxygen Tripod Ligand

journal contribution

posted on 1998-02-25, 00:00 authored by Wa-Hung Leung, Eddie Y. Y. Chan, Wing-Tak Wong

Interaction of L_OEt(PPh₃)₂RuCl (L_OEt = (η⁵-C₅H₅)Co{P(OEt)₂O}₃] with Me₃SiC⋮CH and 2-phenyl-3-butyn-2-ol in the presence of NH₄PF₆ in MeOH/THF afforded the structurally characterized methoxycarbene [L_OEt(PPh₃)₂RuC(OMe)Me]PF₆ (1) and the allenylidene complex [L_OEt(PPh₃)₂RuCCCPhMe]PF₆ (2), respectively. The Ru−C distances in 1 and 2 are 1.876(6) and 1.86(2) Å, respectively. The cyclic voltammograms of 1 and 2 exhibit reversible Ru(III/II) couples at 0.58 and 0.64 V vs Cp₂Fe^+/0, respectively.