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Vibrational and electronic circular dichroism monitoring of copper(II) coordination with a chiral ligand
Author(s) -
Wu Tao,
Zhang XiaoPeng,
Li ChengHui,
Bouř Petr,
Li YiZhi,
You XiaoZeng
Publication year - 2012
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.22010
Subject(s) - chemistry , copper , circular dichroism , vibrational circular dichroism , ligand (biochemistry) , coordination complex , chirality (physics) , crystallography , stereochemistry , computational chemistry , organic chemistry , metal , chiral symmetry , receptor , quantum mechanics , biochemistry , physics , nambu–jona lasinio model , quark
Novel copper(II) coordination compounds with chiral macrocyclic imine ligands derived from R ‐/ S ‐camphor were asymmetrically synthesized and characterized with the aid of chiroptical spectroscopies. Crystal structures of both enantiomers were determined by single crystal X‐ray diffraction analysis. Circular dichroism (CD) spectra were analyzed using a simplified exciton model as well as quantum chemical computations. The absolute configuration of the copper(II) coordination compounds determined from CD was found consistent with the crystal data. The copper(II) complexes were further investigated by vibrational CD (VCD) measurement combined with density functional theory calculation. The complex formation was evidenced by spectral shifts of the characteristic bands in the CD and VCD spectra. Chirality 24:451–458, 2012. © 2012 Wiley Periodicals, Inc.