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Giving lanthanides a new twist: The chiral nonaaza macrocycle L wraps tightly around lanthanide(III) ions in a helical fashion (see picture). The all-R enantiomer of the macrocycle, LRRRRRR, forms kinetically controlled complexation products of M helicity (100 % de), which undergo inversion to the P diastereomer (90 % de). Both products have been isolated in enantiopure form and structurally characterized.
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Gregoliński et al. (2006) studied this question.
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