Solid-state circular dichroism and hydrogen bonding: Absolute configuration of massarigenin A from Microsphaeropsis sp

Chirality ◽  
2011 ◽  
Vol 23 (8) ◽  
pp. 617-623 ◽  
Author(s):  
Hidayat Hussain ◽  
Ishtiaq Ahmed ◽  
Barbara Schulz ◽  
Siegfried Draeger ◽  
Ulrich Flörke ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Circular Dichroism ◽  
Solid State ◽  
Absolute Configuration ◽  
Circular Dichroïsm

Circular dichroism of palladium(II) and platinum(II) diamine complexes

1979 ◽  
Vol 57 (1) ◽  
pp. 67-70 ◽  
Author(s):  
E. A. Sullivan
Keyword(s):  
Circular Dichroism ◽  
Solid State ◽  
Absolute Configuration ◽  
Chiral Diamine ◽  
The Absolute ◽  
Diamine Ligands ◽  
Circular Dichroïsm

An identifiable relationship exists between the absolute configuration of chiral diamine ligands and the circular dichroism of their complexes with palladium(II) and platinum(II). Complexes which contain simple C-substituted diamines with the R-absolute configuration show positive circular dichroism in the region associated with the 1A1g → 1Eg transition, both in solution and the solid state. There is no general consistency in the sign of the 1A1g → 1A2g transition, and only for solution does the sign of the net circular dichroism show a correlation with the absolute configuration of the ligands.

Absolute configuration of the 1,2-diol of digoxin determined by electronic circular dichroism induced with [Mo2(OAc)4]

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
Y Ren ◽  
H Taborda Ribas ◽  
E Sass ◽  
HB Chai ◽  
DM Lucas ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Electronic Circular Dichroism ◽  
Circular Dichroïsm

Circular dichroism and infrared study of β-turn formation in repeat peptides of elastin

1987 ◽  
Vol 52 (5) ◽  
pp. 1356-1361
Author(s):  
S. Abdel Rahman ◽  
M. Elsafty ◽  
A. Hattaba
Keyword(s):  
Circular Dichroism ◽  
Solid State ◽  
Ir Spectra ◽  
Chain Length ◽  
Room Temperature ◽  
Infrared Study ◽  
Feature Characteristic ◽  
C 50 ◽  
The Stability ◽  
Circular Dichroïsm

The conformation of elastin-like peptides Boc-Ala-Pro-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Ala-Pro-Gly-Val-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Gly-Val-Ala-Pro-Gly-Val-Gly-Val-APEGM were examined in solution using circular dichroism at 30 °C, 50 °C, and 70 °C and in solid state by IR at room temperature. The studies show that the β-turn is a significant conformational feature for peptides under investigation in solution at 30 °C and 50 °C, but at 70 °C the tetra, hexa, and decapeptides show the CD feature characteristic of the β-structure while the dodecapeptide spectra show the presence of β-turn which indicates the stability of the β-turn at this chain length. The IR spectra show that in the solid state at room temperature all investigated peptides assume essentially a β-turn except the tetrapeptide which present evidence of antiparallel β-structure. The β-turn contribution in the IR spectra increases with the increase of the chain length of the peptide.

Enantiopure methoxetamine stereoisomers: chiral resolution, conformational analysis, UV-circular dichroism spectroscopy and electronic circular dichroism

2021 ◽  
Author(s):  
Kun Won Lee ◽  
Ahmed H. E. Hassan ◽  
Youngdo Jeong ◽  
Seolmin Yoon ◽  
Seung-Hwan Kim ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Conformational Analysis ◽  
Absolute Configuration ◽  
Circular Dichroism Spectroscopy ◽  
Chiral Resolution ◽  
Treatment Resistant Depression ◽  
Treatment Resistant ◽  
Electronic Circular Dichroism ◽  
Resistant Depression ◽  
Circular Dichroïsm

Enantioseparation and assignment of absolute configuration of methoxetamine (MXE) enantiopure stereoisomers; a promising novel antidepressant for management of treatment-resistant depression.

scholarly journals Messung und Berechnung der CD-Spektren der Biaryl-Alkaloide Ancistrocladein und Dioncophyllein A [1] / Detection and Calculation of the CD Spectra from the Biaryl Alkaloids Ancistrocladeine and Dioncophylleine A [1]

1993 ◽  
Vol 48 (2) ◽  
pp. 140-148 ◽  
Author(s):  
J. Fleischhauer ◽  
A. Koslowski ◽  
B. Kramer ◽  
E. Zobel ◽  
G. Bringmann ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Cd Spectra ◽  
Circular Dichroïsm

AbstractThe circular dichroism (CD) of the biaryls ancistrocladeine and dioncophylleine A has been studied. The CNDO/S method in combination with a Boltzmann weighting o f different structures using AM 1 energies has been applied to reproduce the experimental CD spectra o f the two alkaloids with known absolute configuration at with those o f the exciton chirality method.

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