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Control of the Helical Chirality in Octahedral Complexes by a Chiral Macrobicyclic Cavity Possessing Six Convergent Hydroxyl Groups
Author(s) -
Baret Paul,
Beaujolais Virginie,
Gaude Didier,
Coulombeau Christian,
Pierre JeanLouis
Publication year - 1997
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.19970030619
Subject(s) - enantiomer , octahedron , chirality (physics) , chemistry , chromium , ligand (biochemistry) , stereochemistry , crystallography , gallium , planar chirality , crystal structure , enantioselective synthesis , organic chemistry , receptor , catalysis , physics , chiral symmetry , biochemistry , nambu–jona lasinio model , quantum mechanics , quark
The ( aR, aR, aR ) and ( aS, aS, aS ) enantiomers of a chiral macrobicyclic ligand with a bicapped tris(binaphthol) structure were synthesized. Complexation of gallium(III), chromium(III) and iron(III) centres in the chiral cavities of these two ligands yielded exclusively one octahedral configuration in each case: the ( aR, aR, aR ) enantiomer gave a A complex and the ( aS, aS, aS ) enantiomer a complex. These assignments were established by CD spectroscopy for chromium and iron centres and by molecular modelling.