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A novel use of cobalt(III) meso ‐tetraphenylporphyrin as a chiral shift reagent
Author(s) -
Abraham Raymond J.,
Plant James,
Bedford Geoffrey R.,
Wright Brian
Publication year - 1984
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270220113
Subject(s) - tetraphenylporphyrin , cobalt , diastereomer , chemistry , chirality (physics) , reagent , enantiomer , spectral line , asymmetric carbon , enantiomeric excess , nmr spectra database , polymer chemistry , stereochemistry , crystallography , inorganic chemistry , photochemistry , porphyrin , organic chemistry , catalysis , chiral symmetry , enantioselective synthesis , optically active , nambu–jona lasinio model , physics , quantum mechanics , astronomy , quark
The NMR spectra of the diastereomeric complexes formed by the coordination of nitrogenous enantiomeric bases with cobalt(III) meso ‐tetraphenylporphyrin (CoTPP) allow the immediate differentiation of these complexes. The spectra are interpreted on the basis of symmetry ( RR and SS ) and pseudo‐chirality ( RS and SR ) considerations. The effects are observed in both the proton and carbon spectra and the complexes are stable in both CDCl 3 and DMSO‐ d 4 solution. This technique, in principle, allows the ready determination of the optical purity of multifunctional ligands.