Molecular structure and spectroscopic characterization of cobalt and copper complexes with a hexadentate nitrogen ligand, 1,10-bis(2-pyridylmethyl)-1,4,7,10-tetraazadecane

XAS examination of glutathione–cobalt complexes in solution

“…It was claimed that for cobalt, the coordination to the glutamic moiety (N1O1) occurred first, followed by thiol coordination, together with deprotonation of the Glu-Cys amide nitrogen (N2) at high pH. Co(III)-N amine bond lengths in mononuclear octahedral Co(III) solid crystallized complexes containing polyamino and/or aminothiol ligands ranged between 1.92 and 2.05 Å taking into account sulfur trans effect [59][60][61][62][63]. In Co:GSH pH12 , the Co-N1 distance (Table 1) was probably lengthened due to the same effect.…”

Configuration of Octahedral Metal Compounds − Equilibrium, Crystal and Molecular Structure of Nickel(II) Complexes of Linear N2O4, N4S2 or N6 Donors Set Atoms Ligands

“…Pertinent crystallographic and refinement details are reported in Table 2. [6,7] A view of the cation with the labelling scheme is shown in Figure 1.…”

“…We have studied the coordination of first-row transition metals (cobalt, nickel, copper and zinc) with the linear hexadentate ligands pytrien, [6] pydado [7] and pydadt, [7] which possess two central N, O and S donors, respectively. These ligands, with three different donor atoms, are of the type A B C C B A, in which A represents a pyridyl nitrogen atom, B a secondary amine nitrogen atom and C the central heteroatom (N, O or S).…”

“…( Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) 2,11-diazadodecane (pydadt)]. [6,7] These ligands contain ether oxygen or thioether donors as well as aliphatic and aromatic nitrogen donors in the their ligand framework (Scheme 1).…”

Synthesis, Spectral and Antibacterial Studies of Copper(II) Tetraaza Macrocyclic Complexes

“…Many metal complexes of naturally occurring porphyrins, corrins and phthalocyanines have been investigated because of their potential as dyestuffs or pigments [8–11]. Macrocyclic ligand complexes are of great importance in enhancing various industrial applications and in a number of biological processes such as photosynthesis and dioxygen transport [12] catalytic properties, potential applications as metal extractants, radiotherapeutic and medical imaging agents and to potency towards DNA binders [13] with a high potential in anti-tumor therapy, has provided a motivation for investigation of the metal ion chemistry of these systems, as well as of cyclic ligand systems [8,9,14,15]. Cu(II) is the most studied metal ion among all the transition metal ions [16,17].…”