Structure effects in copper coordination compounds of ligands with thioether, aromatic nitrogen, and ether donors

Abstract

Les deux cations sont des espkces pyramidales carrCes 1Cgkrement deformees qui, dans le solide, posskdent des interactions avec leurs anions C10,-et l'un des cycles pyridiniques dans le complexe L1 et avec I'atome de cuivre dans le complexe L2. On a examine les complexes par resonance paramagnktique Clectronique, par spectroscopie Clectronique et par voltampCromCtrie cyclique. En se basant sur une comparaison de ces nouveaux complexes avec les donnCes publikes pour des substances apparentees, on a CvaluC les effets de la coordination par I'anion, de la solvatation et de

Thiophenophane metal complexes IV. Effects from ligand changes outside the coordination sphere

“…Comparison of the results of our studies (3,24) of solution structures with those of others (29-3 1) suggests that coordination spheres of the solvated species are quite dependent on the nature of the solvent, which influences, among other things, the degree to which original ligands are lost, the extent of solvation, and the stereochemistry.…”

“…The major component is [CuCl.n(DMF)lf and the minor component is [CuC1(L)lf. These components are commonly seen in solutions of related substances and arise from a solvent-driven dissociative equilibrium (3,24). (Table 5).…”

Preparations for 1,4,7,11,14,17-hexa-thiacycloeicosane, 1,4,7-trithiecan-9-ol, 1,11 -dioxa-4,8,14,18-tetrathia-cycloeicosane, 1 -oxa-4,8-dithiacyclo-decane, and some complexes of iron, cobalt, nickel, and palladium

“…For development of such applications, structure-function relationships at the molecular level and appreciation of the relationship between molecular structure and bulk properties are of importance (23). As part of our continuing interest in the influence of ligand structure on properties of thioether-metal complexes (24)(25)(26)(27)(28)(29) we now report property effects caused by introduction of an extra-cyclic functional group, replacement of thioether donors by trans-ethers, and increased carbon chain length between donor sites of a macrocyclic ligand. The ligands used in this study are shown in Fig.…”

Copper(II) complexes of open-chain thioether ligands terminated by salicylaldimine functionality*This article has a companion paper in this issue (doi: 10.1139/v11-081).

“…It should be noted in this context that coordination by ethereal oxygen in a hydrocarbon chain also containing thioether sulfurs is well-known. [22][23][24] The structure of VII involves roughly octahedral NO 3 SBr coordination spheres about each of two copper atoms. The coordination spheres share common ethereal and phenolic oxygens and as a result the pseudo-octahedra are tipped towards each other by 74.57 (5)°so that the angle between their O 2 NS planes is 105.43(5)°.…”

“…Ligands in this study ( Fig. 1) terminated by salicylaldimine functions are related to open-chain ligands terminated by alkyl, 13 pyridyl, 14 thienyl, 15 pyrazolyl, 16 and benzamidazolyl 16 functionalities that we have described in earlier work.…”