Vibrational circular dichroism towards asymmetric catalysis: chiral induction in substrates coordinated with copper(ii) ions

2020 ◽  
Vol 22 (42) ◽  
pp. 24393-24398
Author(s):  
Hisako Sato ◽  
Kazuyoshi Takimoto ◽  
Jun Yoshida ◽  
Akihiko Yamagishi
Keyword(s):  
Circular Dichroism ◽  
Asymmetric Catalysis ◽  
Vibrational Circular Dichroism ◽  
Chiral Induction ◽  
Circular Dichroïsm ◽  
Origin Of Chirality ◽  
Steric Control

The VCD method was applied for searching the origin of chirality selection in the asymmetric catalysis by Cu(ii) complexes. When 1-phenyl-1,3-butanedionato was coordinated, it was transformed to a twisted chiral form under the steric control.

Solid-State Vibrational Circular Dichroism as Applied for Heterogenous Asymmetric Catalysis: Copper(II) Complexes Immobilized in Montmorillonite

2021 ◽  
Author(s):  
Hisako Sato ◽  
Kazuyoshi Takimoto ◽  
Jun Yoshida ◽  
Yutaka Watanabe ◽  
Akihiko Yamagishi
Keyword(s):  
Circular Dichroism ◽  
Solid State ◽  
Asymmetric Catalysis ◽  
Vibrational Circular Dichroism ◽  
Circular Dichroïsm

scholarly journals Solid Phase Nitrosylation of Enantiomeric Cobalt(II) Complexes

Chemistry ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 585-597
Author(s):  
Mads Sondrup Møller ◽  
Morten Czochara Liljedahl ◽  
Vickie McKee ◽  
Christine J. McKenzie
Keyword(s):  
Circular Dichroism ◽  
Solid State ◽  
Atmospheric Pressure ◽  
Solid Phase ◽  
Cobalt Complexes ◽  
Vibrational Circular Dichroism ◽  
Chiral Induction ◽  
Solution State ◽  
Circular Dichroïsm ◽  
Salen Ligand

Accompanied by a change in color from red to black, the enantiomorphic phases of the cobalt complexes of a chiral salen ligand (L2−, Co(L)·CS2, and Co(L) (L = LS,S or LR,R)) chemisorb NO (g) at atmospheric pressure and rt over hours for the CS2 solvated phase, and within seconds for the desolvated phase. NO is installed as an axial nitrosyl ligand. Aligned but unconnected voids in the CS2 desorbed Co(LR,R)·CS2 structure indicate conduits for the directional desorption of CS2 and reversible sorption of NO, which occur without loss of crystallinity. Vibrational circular dichroism (VCD) spectra have been recorded for both hands of LH2, Zn(L), Co(L)·CS2, Co(L), Co(NO)(L), and Co(NO)(L)·CS2, revealing significant differences between the solution-state and solid-state spectra. Chiral induction enables the detection of the νNO band in both condensed states, and surprisingly also the achiral lattice solvent (CS2 (νCS at 1514 cm−1)) in the solid-state VCD. Solution-state spectra of the paramagnetic Co(II) complex shows a nearly 10-fold enhancement and more extensive inversion of polarity of the vibrations of dominant VCD bands compared to the spectra of the diamagnetic compounds. This enhancement is less pronounced when there are fewer polarity inversions in the solid state VCD spectra.

Infrared vibrational circular dichroism

1972 ◽  
pp. 1084 ◽  
Author(s):  
R. J. Dudley ◽  
S. F. Mason ◽  
R. D. Peacock
Keyword(s):  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Circular Dichroïsm

Valence optical theory of vibrational circular dichroism and Raman optical activity

1988 ◽  
Vol 65 (2) ◽  
pp. 327-344 ◽  
Author(s):  
Juan R. Escribano ◽  
Laurence D. Barron
Keyword(s):  
Circular Dichroism ◽  
Optical Activity ◽  
Vibrational Circular Dichroism ◽  
Raman Optical Activity ◽  
Optical Theory ◽  
Circular Dichroïsm

A frequency weighted sum rule for vibrational circular dichroism intensities

1987 ◽  
Vol 87 (11) ◽  
pp. 6775-6776 ◽  
Author(s):  
P. L. Polavarapu
Keyword(s):  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Weighted Sum ◽  
Sum Rule ◽  
Circular Dichroïsm

Vibrational circular dichroism theory: a localized molecular orbital model

1977 ◽  
Vol 49 (3) ◽  
pp. 441-446 ◽  
Author(s):  
Laurence A. Nafie ◽  
Thomas H. Walnut
Keyword(s):  
Circular Dichroism ◽  
Molecular Orbital ◽  
Vibrational Circular Dichroism ◽  
Circular Dichroïsm ◽  
Molecular Orbital Model

ChemInform Abstract: Theory of Vibrational Circular Dichroism: trans-2,3-Dideuteriooxirane

ChemInform ◽  
1988 ◽  
Vol 19 (28) ◽  
Author(s):  
K. J. JALKANEN ◽  
P. J. STEPHENS ◽  
R. D. AMOS ◽  
N. C. HANDY
Keyword(s):  
Circular Dichroism ◽  
Vibrational Circular Dichroism ◽  
Abstract Theory ◽  
Circular Dichroïsm

Absolute Configuration of the Meroditerpenoids Taondiol and Epitaondiol Diacetates by Vibrational Circular Dichroism

Heterocycles ◽  
2012 ◽  
Vol 85 (8) ◽  
pp. 1961 ◽  
Author(s):  
Pedro Joseph-Nathan ◽  
Marcelo A. Muñoz ◽  
Carlos Areche ◽  
Juana Rovirosa ◽  
Aurelio San Martín ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Vibrational Circular Dichroism ◽  
Circular Dichroïsm
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