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Richard E. Douthwaite Neil Guillaume Adrian C. Whitwood 《Journal of organometallic chemistry》2006,691(4):711-716
Reaction between 9,9′-spirobifluorene and [CpM]+ (where M = Fe and Ru) equivalents gives the complexes [CpRu(η6-SBF)][PF6] (1), [(CpRu)2(η6,η6-SBF)][PF6]2 (2) and [(CpFe)2(η6,η6-SBF)][PF6]2 (3), respectively. Single crystal X-ray structures of 1 and 3 show that the metal atoms exhibit distorted η6-coordination to SBF phenyl moieties primarily as a consequence of steric interactions between Cp and SBF. The structure of 3 contains each of the possible C2 enantiomers whereas NMR spectroscopy shows signals consistent with a 1:1 mixture of C2 and C1 stereoisomers for both 2 and 3. In conjunction with electrochemical data the observations are consistent with SBF acting as a molecule containing two independent biphenyl moieties. 相似文献
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