The higher the π‐acidity of the aldehyde ligand the more pronounced the chiral recognition in its bonding to the chiral complex 1 . This emerges from low‐temperature NMR spectroscopic investigations on reactions of the complex 1 with the aromatic aldehydes 2 , which, in addition, showed that the diastereomeric π‐aldehyde complexes of 1 and 2 interconvert intramolecularly via a σ‐aldehyde complex. equation image
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Méndez et al. (1990) studied this question.
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