Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Study of amino acid coordination to chromium(III) by deuterium NMR spectroscopy

Thesis/Dissertation ·
OSTI ID:6550256
Interest in monodentate amino acid coordination to chromium(III) results in the synthesis and characterization of the Cr(III)-nicotinic acid complexes and the /sup +/-carboxylato-..mu..-hydroxo Cr(III) complexes. A relatively stable Cr(III) complex containing carboxyl-bound nicotinic acid, trans-(Cr(1,3-pn)/sub 2/(nic-O)/sub 2/) Cl (where 1,3-pn = 1,3-propanediamine, and nic-O = nicotinate with a deuterium label on the 2-carbon), was synthesized and then characterized by deuterium NMR spectroscopy. An additional complex containing nicotinic acid, (Cr(en)/sub 2/(OH)(Hnic-O,O)Cr(en)/sub 2/)(ZnCl/sub 4/)/sub 2/Cl (where en = ethylenediamine, and Hnic-O,O = nicotinate with the carboxyl group bridging between the Cr(III) centers and the pyridyl nitrogen protonated), was also synthesized and characterized by /sup 2/H NMR. A series of bis(en)Cr(III)-amino acid complexes were characterized by /sup 2/H NMR spectroscopy. Bis(1,3-pn)Cr(III) and (3,2,3-tet)Cr(III) complexes (where 3,2,3-tet = 1,5,8,12-tetraazadodecane) containing alanine and glycine were also prepared. An additional complex, ..cap alpha..-cis-(Cr(edda)(gly)), was synthesized and its crystal structure determined.
Research Organization:
Washington State Univ., Pullman (USA)
OSTI ID:
6550256
Country of Publication:
United States
Language:
English