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[(η 6 ‐Cyclooctatetraene){η 5 ‐(+)‐neomenthylcyclopentadienyl}ruthenium( II )] Hexafluorophosphate: Synthesis and Characterization of a Chiral Mixed Sandwich Complex
Author(s) -
Zhang Xiaofeng,
Prosenc Marc H.,
MeyerFriedrichsen Timo,
Heck Jürgen
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390042
Subject(s) - ruthenium , hexafluorophosphate , chemistry , cyclooctatetraene , acetonitrile , ligand (biochemistry) , medicinal chemistry , stereochemistry , organic chemistry , molecule , catalysis , biochemistry , ionic liquid , receptor
Abstract Three different {η 5 ‐(+)‐neomenthylcyclopentadienyl}ruthenium complexes have been synthesized from (−)‐menthol: [(η 6 ‐benzene){η 5 ‐(+)‐neomenthylcyclopentadienyl}ruthenium( II )] hexafluorophosphate ( 1 ), [tris(acetonitrile){η 5 ‐(+)‐neomenthylcyclopentadienyl}ruthenium( II )] hexafluorophosphate ( 2 ) and [(η 6 ‐cyclooctatetraene){η 5 ‐(+)‐neomenthylcyclopentadienyl}ruthenium( II )] hexafluorophosphate ( 3 ). X‐ray structural determination (space group P 2 1 2 1 2 1 ) and NMR spectroscopic studies of 3 show it exists as a single stereoisomer in both the solid and solution phase, with [α] 20 D = +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)