Further chemistry of ruthenium butatrienylidene complexes |
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Authors: | Michael I Bruce Benjamin G Ellis Allan H White |
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Institution: | a Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia b Chemistry M313, University of Western Australia, Crawley, Western Australia 6009, Australia |
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Abstract: | Several complexes have been obtained from reactions carried out in early attempts to prepare the diynyl complexes Ru(CCCCR)(dppe)Cp* (R = H, SiMe3). These have been identified crystallographically as the acyl complex Ru{CCC(O)Me}(dppe)Cp* (3), the cationic imido complex Ru{CCC(NH2)Me}(dppe)Cp*]PF6 (4), the binuclear butenynylallenylidene {Ru(dppe)Cp*}2{μ-CCC(OMe)CHCMeCC}]PF6 (5), and the bis(ethynyl)cyclobutenylidene {Ru(dppe)Cp*}2{μ-CCC4H2(SiMe3)CC}]PF6 (6). NMR studies of 5 have revealed the existence of two isomers. Plausible routes for their formation from the putative butatrienylidene intermediate Ru(CCCCH2)(dppe)Cp*]+ (A) are discussed. |
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