Closely related macrocyclic and acyclic tridentate, pyridine derivatives, containing sulphur, and their complexes. Crystal structures of {dichloro-3,10-dithia-16-azabicyclo[l0.3.1]hexadeca-1(16),12,14-triene}copper(II) and [2,6-bis(ethyithiomethyl)pyridine]dichlorocopper(II)

Copper(II) Complexes of 2-(Methylthiomethyl)anilines: Spectral and Structural Properties and In Vitro Antimicrobial Activity

“…The presence of chloride bridges between the adjacent molecules results in a "ladder-like" polymeric structure seen in Figure 2. The bond distances for Cu1-N1 and Cu1-S1 which are 2.075(18) and 2.321(6)Å, respectively, fall within the expected ranges [31,32] and the Cu1-S1 distance is typical of equatorially bound thioether sulfur [33][34][35][36][37][38][39][40]. Cu-Cl lengths are observed at 2.255(6)Å (Cu1-Cl1 terminal bond), 2.318(5)Å (Cu1-Cl2 in the basal bond), 2.690(5)Å (Cu1-Cl2 bridging bond), and 2.932(5)Å (Cu1-Cl2 bridging bond).…”

Complexes of late transition metals containing the mixed donor ligands 2,6-(RSCH2)2C5H3N (R = Ph, Me): Crystal structures of [{Cu(2,6-(PhSCH2)2C5H3N)(µ-X)}2] (X = Cl, Br) and [Ni(2,6-(PhSCH2)2C5H3N)Br2]

“…These structural features are also observed in the copper() compound [Cu{2,6-bis(ethylthiomethyl)pyridine}Cl 2 ]. 12 The related complex [Ni{2,6-bis(benzylthiomethyl)pyridine}Br(µ-Br)] 2 has a considerably different structure where the molecule is dimeric through bridging bromide atoms with octahedral nickel centres, 16 2,6-bis(benzylthiomethyl)pyridine also acting as a tridentate ligand and coordinating to the metal centres in a meridional fashion. A terminally bound bromide atom occupies the remaining coordination site.…”

“…9 This ligand type contains three donor atoms, allowing for the ligand to act as a tridentate (II) or bidentate ligand (III). In the solid-state, these ligands generally behave as tridentate ligands, bonding to metal centres through the pyridyl nitrogen centre and both sulfur atoms, [10][11][12][13][14][15][16] with one exception where bidentate ligation is observed. 17 In solution, although the ligand can behave as a bidentate, chelating metal centres through the pyridyl nitrogen and one sulfur atom, it can readily undergo fluxional processes.…”

Trigonal Planar Copper(I) Complex: Synthesis, Structure, and Spectra of a Redox Pair of Novel Copper(II/I) Complexes of Tridentate Bis(benzimidazol-2‘-yl) Ligand Framework as Models for Electron-Transfer Copper Proteins

“…Several Cu(II) and Cu(I) − complexes containing pyridine/benzimidazole and thioether donors have been synthesized as models for the redox-active sites in the proteins, and their structures and spectral and redox behavior have been investigated. Though copper complexes of several N 2 S 3 , , N 2 S 2 , ,− and N 2 S , ligands containing unsaturated nitrogens have been well-documented, those of NS 2 type of ligands have not elicited much interest, and only recently a few complexes of ligands like 2,6-bis(ethylthiomethyl)pyridine (betmp, Chart ) are known . Such ligands are of interest in making models for type I copper proteins as a low-pH form of plastocyanin, with one of the two histidine imidazoles in the type I active sites being protonated and containing a site with a planar CuNS 2 chromophore .…”