INFRARED SPECTRA AND COORDINATE BONDING OF COPPER(II) AND NICKEL(II) POLYGLYCINE CHELATES IN AQUEOUS SOLUTION
- 1 August 1974
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 4 (1) , 9-18
- https://doi.org/10.1080/00958977408075873
Abstract
Infrared absorption spectra in aqueous (D2O) solution are employed to elucidate the nature of coordinate bonding in copper(II)- and nickel(II)-polyglycine chelates formed over the full pH range from strongly acid to strongly alkaline solution. These assignments provide the first microscopic evidence for metal-polyglycine coordinate sites in acid solution. Shifts in peptide carbonyl and terminal carboxylate frequencies are interpreted as indications of the conformational changes in both copper(II) and nickel(II) chelates as dissociation of hydrogen ion takes place to convert the initial complexes to the ultimate high pH forms, MH−nL1–n and MH−nLOH−n where n is the number of peptide linkages in the ligand.Keywords
This publication has 10 references indexed in Scilit:
- New multidentate ligands. XV. Chelating tendencies of diglycine-N,N-diacetic acid, triglycine-N,N-diacetic acid, and tetraglycine-N,N-diacetic acidInorganic Chemistry, 1974
- Proton nuclear magnetic resonance study of metal-glycine peptide complexes. Copper(II) and nickel(II) complexesJournal of the American Chemical Society, 1969
- The Metal Complexes of Peptides and Related CompoundsPublished by Elsevier ,1968
- Nickel(II) complexes of glycine peptides in aqueous solutionJournal of the American Chemical Society, 1967
- Copper(II) Complexes of Triglycine and Tetraglycine1,2Journal of the American Chemical Society, 1966
- Effects of Charge and Nickel Ion on Proton Chemical Shifts of Glycyl PeptidesThe Journal of Physical Chemistry, 1965
- Copper(II) Complexes of Glycylglycine*Biochemistry, 1964
- Infrared Spectra of Aqueous Solutions. IV. Glycine and Glycine PeptidesJournal of the American Chemical Society, 1963
- Coördination Complexes and Catalytic Properties of Proteins and Related Substances. IV. Reactions of Glycine-containing Dipeptides with Cupric Ions and with p-Nitrophenyl Acetate1Journal of the American Chemical Society, 1960
- Coördination Complexes and Catalytic Properties of Proteins and Related Substances. III. Effect of Zinc and Cupric Ions on the Reaction of p-Nitrophenyl Acetate with Glycylglycine1,2Journal of the American Chemical Society, 1959