Cluster chemistry: XXXIII. Reactions of [{Au(PPh 3)} 3O] + with [Ru 3(μ 3-C 2Bu t)(CO) 9] −: X-ray structure of [Ru 3Au 2(μ 3-CCHBu t)(CO) 9(PPh 3) 2], containing a t-butylvinylidene ligand attached to a trigonal-bipyramidal Ru 3Au 2 core

Abstract

Deprotonation (K[HBBu 3 s]) of HRu 3(μ 3-C 2Bu t)(CO) 9, followed by reaction of the anion with [O{Au(PPh 3)} 3][BF 4], afforded the known complex Ru 3Au(μ 3-C 2Bu t)(CO) 9 (9%), the vinylidene cluster Ru 3Au 2(μ 3-CCHBu t)(CO) 9(PPh 3) 2 (16%) and the hexanuclear Ru 3Au 3(C 2Bu t)(CO) 8(PPh 3) 3 (3%). The X-ray structure of the pentanuclear complex shows an asymmetric trigonal-bipyramidal Ru 3Au 2 core (Ru, Au at the apices) with the Ru 3 face bridged by a t-butylvinylidene ligand, being σ-bonded to Ru(1) and Ru(3), and η 2-coordinated to Ru(2). Crystals are monoclinic, space group P2 1/ n with a 19.121(3), b 13.109(3), c 23.649(4) Å, β 106.76(2)° and Z = 4. The structure was solved using 4405 observed diffractometer data, and refined to R 0.044, R w 0.047.