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Cluster chemistry: XXXIII. Reactions of [{Au(PPh3)}3O]+ with [Ru3(μ3-C2But)(CO)9]−: X-ray structure of [Ru3Au2(μ3-CCHBut)(CO)9(PPh3)2], containing a t-butylvinylidene ligand attached to a trigonal-bipyramidal Ru3Au2 core
Authors:Michael I. Bruce  Ernst Horn  Omar Bin Shawkataly  Michael R. Snow
Affiliation:Jordan Laboratories, Department of Physical and Inorganic Chemistry, University of Adelaide, Adelaide, South Australia, 5001 Australia
Abstract:Deprotonation (K[HBBu3s]) of HRu33-C2But)(CO)9, followed by reaction of the anion with [O{Au(PPh3)}3][BF4], afforded the known complex Ru3Au(μ3-C2But)(CO)9 (9%), the vinylidene cluster Ru3Au23-CCHBut)(CO)9(PPh3)2 (16%) and the hexanuclear Ru3Au3(C2But)(CO)8(PPh3)3 (3%). The X-ray structure of the pentanuclear complex shows an asymmetric trigonal-bipyramidal Ru3Au2 core (Ru, Au at the apices) with the Ru3 face bridged by a t-butylvinylidene ligand, being σ-bonded to Ru(1) and Ru(3), and η2-coordinated to Ru(2). Crystals are monoclinic, space group P21/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, Rw 0.047.
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