Sb–C Bond Cleavage Reaction on a Triruthenium Cluster and the Formation of a Bridging Phenylacyl Unit

• Published in: Journal of cluster science Vol. 15; no. 3; pp. 387 - 394
• Main Authors: bin Shawkataly, O, Ramalingam, K., Fun, H.K., Rahman, A. Abdul, Razak, I.A.
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01-09-2004
• Subjects: Carbonyls; Clusters; Crystal structure; Crystallography; NMR; Nuclear magnetic resonance; Room temperature; Single crystals
• ISSN: 1040-7278; 1572-8862
• DOI: 10.1023/B:JOCL.0000041202.36618.99

Syntheses and single crystal X-ray structures of an open triruthenium acyl carbonyl cluster [(C6H5)2SbRu3(COC6H5)(CO)10] (1) and a simple triruthenium Ru3(CO)9[(C6H5)2PCH2P(C6H5)2]Sb(C6H5)3(2) are reported. Formation of compound (1) at room temperature from [Ru3(CO)12] and [Sb(C6H5)3] is unique, a similar reaction with Ru3(CO)10[(C6H5)2PCH2P(C6H5)2] under identical conditions results in compound (2), with Sb(C6H5)3 occupying an equatorial site. IR, 1H, 13C NMR spectra of the compounds are reported. The X-ray crystal structure of (1) consist of 2 crystallography distinct molecules and shows Ru–Sb distances in the range: 2.6361(6)–2.6273(7) Å and Ru–Ru distances in the range: 2.8236(7)–2.9855(7) Å. Ru–O distances in the bridging carbonyl are: 2.137(4), 2.158(4) Å. The Sb–Ru–Ru angles in the two molecules of the asymmetric unit are in the range of 73.78(2)–77.52° indicating the puckered nature. Compound (2) has bond parameters comparable to those of Ru3(CO)10[(C6H5)2PCH2P(C6H5)2]. The present study shows for the first time that the cleaving of Sb–C bond at room temperature is possible under non-ionic conditions, though there have been many instances of P–C and As–C bond cleavages reported previously.