2003•European Journal of Inorganic ChemistryRequires access
[(η6‐Cyclooctatetraene){η5‐(+)‐neomenthylcyclopentadienyl}ruthenium( II )] Hexafluorophosphate: Synthesis and Characterization of a Chiral Mixed Sandwich Complex
Xiaofeng Zhang, Marc H. Prosenc, Timo Meyer‐Friedrichsen, Jürgen Heck
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Abstract
Abstract Three different {η5‐(+)‐neomenthylcyclopentadienyl}ruthenium complexes have been synthesized from (−)‐menthol: [(η6‐benzene){η5‐(+)‐neomenthylcyclopentadienyl}ruthenium(II)] hexafluorophosphate (1), [tris(acetonitrile){η5‐(+)‐neomenthylcyclopentadienyl}ruthenium(II)] hexafluorophosphate (2) and [(η6‐cyclooctatetraene){η5‐(+)‐neomenthylcyclopentadienyl}ruthenium(II)] hexafluorophosphate (3). X‐ray structural determination (space group P212121) and NMR spectroscopic studies of 3 show it exists as a single stereoisomer in both the solid and solution phase, with [α]20D = +92.5. The chiral modification of the Cp ligand induces anisochrony for all of the magnetically active nuclei of the unsubstituted COT ligand. (© Wiley‐VCH Verlag GmbH & Co KGaA, 69451 Weinheim, Germany, 2003)