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Frontispiece: Absolute Asymmetric Synthesis: Viedma Ripening of [Co(bpy) 3 ] 2+ and Solvent‐Free Oxidation to [Co(bpy) 3 ] 3+
Author(s) -
Björemark Per Martin,
Jönsson Johan,
Håkansson Mikael
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201583061
Subject(s) - chemistry , yield (engineering) , chirality (physics) , crystallization , bromine , solvent , enantiomer , enantiomeric excess , crystallography , stereochemistry , organic chemistry , enantioselective synthesis , catalysis , materials science , chiral symmetry , physics , quantum mechanics , nambu–jona lasinio model , metallurgy , quark
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 page 10630 ff.