Tris-chelate complexes with chiral ligands: In search of diastereoisomeric selectivity with remote stereogenic centres |
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Authors: | Edwin C. Constable, Catherine E. Housecroft, Val rie Jullien, Markus Neuburger, Ingo Poleschak, S bastien Reymann, Sina Saxer,Silvia Schaffner |
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Affiliation: | aDepartment of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland |
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Abstract: | The chiral ligands, 4,4′-bis{(1S,2R,4S)-(−)-bornyloxy}-2,2′-bipyridine, (1S,2R,4S)-1, and 4,4′-bis{(1R,2S,4R)-(+)-bornyloxy}-2,2′-bipyridine, (1R,2S,4R)-1, have been prepared and characterized by spectroscopic techniques and, for (1S,2R,4S)-1, by single crystal X-ray diffraction. Despite the use of enantiomerically pure ligands, the formation of the complexes [Fe((1S,2R,4S)-1)3]2+, [Ru((1S,2R,4S)-1)3]2+, [Ru((1S,2R,4S)-1)(bpy)2]2+ and [Ru((1R,2S,4R)-1)(bpy)2]2+ proceeds without preference for either the Δ or Λ-diastereoisomers. |
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Keywords: | 2,2′-Bipyridine Diastereoisomers Ruthenium(II) Iron(II) Chiral ligands |
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