Ultraviolet–circular dichroism spectra for structural analysis of copper(II) complexes with aliphatic and aromatic ligands in aqueous solution

1996 ◽  
pp. 3269-3275 ◽  
Author(s):  
Pier G. Daniele ◽  
Enrico Prenesti ◽  
Giorgio Ostacoli
Keyword(s):  
Aqueous Solution ◽  
Circular Dichroism ◽  
Structural Analysis ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm

scholarly journals Circular dichroism spectra of N,N-Dimethyl-L-amino acids

1973 ◽  
Vol 26 (8) ◽  
pp. 1801 ◽  
Author(s):  
CL Hawkins ◽  
GA Lawrance
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Circular Dichroism ◽  
Cotton Effect ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm

The circular dichroism spectra in the region 190-300 nm have been measured at pH 1 and pH 13 in aqueous solution for a series of N,N-dimethyl-L-amino acids. A dominant positive Cotton effect is generally observed between 205 and 225 nm as has been found previously for the parent L-amino acids. These results are consistent with the same conformer being dominant for both series of compounds.

Circular dichroism spectra of 2-substituted propionatopentaaminocobalt(II) complexes

1971 ◽  
Vol 24 (11) ◽  
pp. 2275 ◽  
Author(s):  
CJ Hawkins ◽  
GA Lawrance
Keyword(s):  
Aqueous Solution ◽  
Circular Dichroism ◽  
Absorption Band ◽  
General Formula ◽  
Optically Active ◽  
Sign Pattern ◽  
Circular Dichroism Spectra ◽  
Cotton Effects ◽  
Circular Dichroïsm

The preparations of a series of optically active complexes with the general formula Co(NH3)5(OCOCH(X)CH3)2+ are reported for X = NH3+, OH, F, Cl, Br, C2H5, and C6H5. The circular dichroism spectra of the complexes have been measured in aqueous solution, in the presence of salts of polarizable anions, and in KBr disks. The spectra have been analysed in terms of three Cotton effects under the 1A1g → 1T1g cubic absorption band and found to be consistent with a +, -, - sign pattern for the L- isomer, corresponding to the two components of the 1A1g → 1Eg (D4h) and to the 1A1g → A2g (D4h) transition, respectively.

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