Further chemistry of ruthenium butatrienylidene complexes
Date
2005
Authors
Bruce, M.
Ellis, B.
Skelton, B.
White, A.
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Journal article
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Journal of Organometallic Chemistry, 2005; 690(7):1772-1783
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Michael I. Bruce, Benjamin G. Ellis, Brian W. Skelton and Allan H. White
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Abstract
Several complexes have been obtained from reactions carried out in early attempts to prepare the diynyl complexes Ru(C≡CC≡CR)(dppe)Cp* (R = H, SiMe<inf>3</inf>). These have been identified crystallographically as the acyl complex Ru{C≡CC(O)Me}(dppe)Cp* (3), the cationic imido complex [Ru{C≡CC(=NH<inf>2</inf>)Me}(dppe)Cp*]PF<inf>6</inf> (4), the binuclear butenynylallenylidene [{Ru(dppe)Cp*}<inf>2</inf>{μ- C≡CC(OMe)=CHCMe=C=C=}]PF<inf>6</inf> (5), and the bis(ethynyl) cyclobutenylidene [{Ru(dppe)Cp*}<inf>2</inf>{μ-C≡CC <inf>4</inf>H<inf>2</inf>(SiMe<inf>3</inf>)C≡C}]PF<inf>6</inf> (6). NMR studies of 5 have revealed the existence of two isomers. Plausible routes for their formation from the putative butatrienylidene intermediate [Ru(=C=C=C=CH<inf>2</inf>)(dppe)Cp*]<sup>+</sup> (A) are discussed. © 2005 Elsevier B.V. All rights reserved.
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Copyright © 2005 Elsevier B.V. All rights reserved.