Reactions of the trivalent copper complex of a macrocyclic tetrapeptide, cyclo-(8-alanylglycyl-.beta.-alanylglycyl)

Carbonyl mediated conductance through metal bound peptides: a computational study

“…Preparations of Cu 2+ and Ni 2+ peptide complexes are well known; however, the complexes can also be oxidized by either an oxidizing agent or an electrochemical process to form the Cu 3+ and Ni 3+ complexes. Remarkably, Cu 3+ and Ni 3+ peptide complexes are relatively stable in aqueous solution and in slightly basic solutions, with half-lives on the order of hours to weeks [25][26][27][28][29][30][31]. The Cu 3+ -peptide complexes are known to have square planar coordination due to the d 8 electron configuration of the Cu 3+ ion, and the low-spin state is preferred.…”

Facile Synthesis of Cyclic Tetrapeptides from Nonactivated Peptide Esters on Metal Centers

“…The Na salt of the complex anion of 11 had already earlier been directly obtained from cyclo(b-alanylglycylb-alanylglycyl). [13] Cyclic b-tetrapeptides such as that in 6 have been reported by Seebach et al [14] Figure 2. Segment of the layer structure formed by the anions of 1.…”

Synthesis, structure and spectroscopic properties of CuL(MeOH), H2L = (E)-N 1-(2-((2-aminocyclohexydiimino)(phenyl)methyl)-4-chlorophenyl)-N 2-(2-benzyl-4-chlorophenyl)oxalamide

“…For example, many copper(II) complexes of tetraazamacrocyclic ligands, which are also of great biological importance, have been electrochemically investigated [1,[4][5][6][7][8][9][10][11][12][13][14][15]. At the same time, it has been found that the oxamide group is an efficient bridging mediator of magnetic exchange between neighbouring metal ions, the type and magnitude of coupling depending on the metal ions used and their coordination environments [16].…”