Stereoselectivity in bis(α-amino-acid)copper(II) complexes: stability constants from circular dichroism and electronic spectra

1972 ◽  
pp. 1012-1017 ◽  
Author(s):  
V. A. Davankov ◽  
P. R. Mitchell
Keyword(s):  
Circular Dichroism ◽  
Amino Acid ◽  
Stability Constants ◽  
Electronic Spectra ◽  
Circular Dichroïsm

Conformational analysis of thymidylate synthase from amino acid sequence and circular dichroism

Biochemistry ◽  
1986 ◽  
Vol 25 (21) ◽  
pp. 6650-6655 ◽  
Author(s):  
Parthasarathy Manavalan ◽  
Denice M. Mittelstaedt ◽  
Michael I. Schimerlik ◽  
W. Curtis Johnson
Keyword(s):  
Circular Dichroism ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Conformational Analysis ◽  
Thymidylate Synthase ◽  
Circular Dichroïsm

Circular dichroism spectra of amino acid complexes. II. Chelated amino acid complexes with the CoN5O chromophore

1970 ◽  
Vol 23 (9) ◽  
pp. 1735 ◽  
Author(s):  
CJ Hawkins ◽  
PJ Lawson
Keyword(s):  
Amino Acids ◽  
Circular Dichroism ◽  
Amino Acid ◽  
Visible Region ◽  
Optically Active ◽  
Circular Dichroism Spectra ◽  
Amino Acid Complexes ◽  
Similar Series ◽  
Cotton Effects ◽  
Circular Dichroïsm

The circular dichroism spectra of a series of optically active (α-aminocarboxylato)tetraamminecobalt(111) complexes have been measured in aqueous solution, and in the presence of salts of polarizable anions. The observed spectra in the visible region have been analysed to determine the signs of the Cotton effects of the three components of the 1A1g ↔ 1T1g cobalt(111) transition. For L-amino acids, the transition with A2g(D4h) parentage is negative, and the two transitions with Eg(D4h) parentage have opposite signs. Published circular dichroism spectra of complexes of the type [Co(en)2(L-am)]2+ were similarly interpreted in terms of a perturbed tetragonal chromophore, and it was shown that the vicinal effect of the L-amino acids imposed the same signs onto the component transitions as for the tetraammines and for a similar series of pentaamminecobalt(111) complexes.

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