Journal of the Chemical Society A: Inorganic, Physical, Theoretical
Journal of the Chemical Society A: Inorganic, Physical, Theoretical was published from 1966 - 1971.
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Paper
J. Chem. Soc. A, 1971, 16 - 20, DOI: 10.1039/J19710000016
-Allylic complexes of rutheniumM. Cooke, R. J. Goodfellow, M. Green and G. Parker
Reaction of [Ru(
-C4H7)2C8H12] with various phosphorus ligands gives soluble crystalline complexes of the type [Ru(-C4H7)2L2][L = P(OMe)3, P(OEt)3, P(OCH2)3CMe, or P(OCH2)3CEt; or L2= Me2PCH2CH2PMe2]. The 1H n.m.r. spectra of these complexes showed that the -allylic groups were asymmetrically bonded to ruthenium. The synthesis of [Ru(-C3H5)2(CO)2] is reported and its 1H n.m.r. spectrum interpreted in terms of two equivalent -allyl groups asymmetrically bonded to ruthenium. Variable-temperature n.m.r. studies show that, in addition to a syn–anti exchange at high temperatures, there is a rapid intramolecular rearrangement at room temperature, in which the CH2 groups of the -allyl groups effectively exchange environments. This is rationalised on the basis of an intramolecular 
twist
mechanism.
