opper

Complexation, Spectroscopic, Thermal, Magnetic And Conductimetric Studies On Some 8-(Arylazo)Coumarins With Divalent Transition Metal Ions

“…Generally, the complexes are not magnetically dilute, therefore, exchanges [26] and/or dipolar forces are expected to operate in such a case, the g anisotropy is likely to be reduced. The absence of hyperfine is taken as evidence of exchange as is the fact that G = g // -2/g (-2) is lower than four [27] which could be attributed to octahedral symmetry around the Cu 2+ ions.…”

X-ray Investigation and Coordination Behaviour of the 1,3-Diallylbenzimidazolium Cation in [C13H15N2]+2 [CuCl2.58Br1.42]2- and [C13H15N2]+[Cu2Cl0.67Br2.33]- Complexes

“…The (C)H±X bonds of 2.8(1)± 3.0(1) A Ê are weak and the (C±H´´´X angles are in II atom can be considered as a result of the Jahn-Teller effect similarly as it takes place in the structure of CsCuCl 3 [9].…”

Metallomicelles as potent catalysts for the ester hydrolysis reactions in water

“…Thus only the Cu(II) complex did not show any catalytic activity with the non-micellized ligands. Molecular models have suggested that central Zn(II) adopts a ternary complex in the form of a tetrahedral geometry, whereas Cu(II) replaces the weakest donor of the ligand to form a preferred planar complex [26].…”

“…The presence of alkyl chain (R) in such ligands also changes the stoichiometry of the complex. In ligand 25, when there is no alkyl group (R = H), it shows a catalytically active complex with a 2:1 (metal:ligand) stoichiometry (26) in gemini surfactant micelle. Interestingly with N-alkylated ligands, i.e.…”