Coordination behavior of L-glutamic acid: spectroscopic and structural properties of (L-glutamato)(imidazole)copper(II), (L-glutamato)(2,2'-bipyridine)copper(II), and aqua(L-glutamato)(1,10-phenanthroline)copper(II) trihydrate complexes
Year: 1985
Type: article
Abstract: The synthesis and structural and spectroscopic characterization of three ternary copper(I1)-L-glutamate complexes of formulasCu(L-glu)(im), Cu(r-glu)(bpy), and Cu(~-glu)(o-phen).4H~(OL -glu = L-glutamate ion; im = imidazole; bpy = 2,2’-bipyridine;o-phen = 1 ,lo-phenanthroline) are described. The Cu(L-glu)(im) complex has a one-dimensional polymeric structure, due to thebridging by the glutamate ligand between square-planar copper ions. The same polymeric structure and the same metal bindingby the glutamate ion occur in the Cu(L-glu)(bpy) complex, but in a square-pyramidal geometry. The structure of [CU(Lglu)(o-phen)H20].3H20 is made up of discrete mononuclear units, in which the glutamate ion acts as a simple bidentate ligandtoward a s uare pyramidal Cu atom.The synthesis and structural and spectroscopic characterization of three ternary copper(I1)-L-glutamate complexes of formulasCu(L-glu)(im), Cu(r-glu)(bpy), and Cu(~-glu)(o-phen).4H~(OL -glu = L-glutamate ion; im = imidazole; bpy = 2,2’-bipyridine;o-phen = 1 ,lo-phenanthroline) are described. The Cu(L-glu)(im) complex has a one-dimensional polymeric structure, due to thebridging by the glutamate ligand between square-planar copper ions. The same polymeric structure and the same metal bindingby the glutamate ion occur in the Cu(L-glu)(bpy) complex, but in a square-pyramidal geometry. The structure of [CU(Lglu)(o-phen)H20].3H20 is made up of discrete mononuclear units, in which the glutamate ion acts as a simple bidentate ligandtoward a s uare pyramidal Cu atom.The synthesis and structural and spectroscopic characterization of three ternary copper(I1)-L-glutamate complexes of formulasCu(L-glu)(im), Cu(r-glu)(bpy), and Cu(~-glu)(o-phen).4H~(OL -glu = L-glutamate ion; im = imidazole; bpy = 2,2’-bipyridine;o-phen = 1 ,lo-phenanthroline) are described. The Cu(L-glu)(im) complex has a one-dimensional polymeric structure, due to thebridging by the glutamate ligand between square-planar copper ions. The same polymeric structure and the same metal bindingby the glutamate ion occur in the Cu(L-glu)(bpy) complex, but in a square-pyramidal geometry. The structure of [CU(Lglu)(o-phen)H20].3H20 is made up of discrete mononuclear units, in which the glutamate ion acts as a simple bidentate ligandtoward a s uare pyramidal Cu atom.Spectroscopic (EPR, IR, and vis) properties of the complexes are interpreted in the lightof the known structures. The polymeric ability of the L-glutamate and L-aspartate ions in the presence of the copper(I1) ion is also discussed
Source: Inorganic Chemistry
DOI: 10.1021/ic00216a029
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3138614829