G. Fusch et al., INTERACTION OF THE LYSINE SIDE-CHAIN AMINO GROUP WITH CUII IN (GLYCYL-L-LYSINE2-)CU, Inorganica Chimica Acta, 217(1-2), 1994, pp. 33-38
Two different modifications of the (gly-L-lys2-)Cu(II) complex (1 and
2) were determined by X-ray crystallography. The dipeptide forms a tri
dentate chelate via COO- (lysine), NH2 (glycine) and the deprotonated
amide group. The amino group of the lysine side chain links copper uni
ts, thereby generating a one-dimensional polymeric structure. The two
modifications differ in a coordinated water molecule at the Cu(II) wit
h 1 analyzing as (C8H15N3O3)Cu(H2O) and 2 as (C8H15N3O3)Cu.2H2O.