Frontispiece: Absolute Asymmetric Synthesis: Viedma Ripening of [Co(bpy)₃]²⁺ and Solvent‐Free Oxidation to [Co(bpy)₃]³⁺

Abstract

Asymmetric Synthesis Syntheses of [Co(bpy)3]2+ yield racemic solutions because the Δ‐ and Λ‐enantiomers are stereochemically labile. However, crystallization and attrition‐enhanced deracemization can give homochiral crystal batches of either handedness in quantitative yield. Subsequently, solvent‐free oxidation with bromine vapour fixes the chirality because [Co(bipy)3]3+ does not enantiomerize in solution at ambient temperature. For more details, see the Communication by M. Håkansson et al. on