A Dimeric Copper(II) 4-Chlorophenoxyisobutyrate Adduct with Methanol and a Monomeric Copper(II) 4-Chlorophenoxyisobutyrate Adduct with Pyridine

Tetrakis(μ-α-naphthylacetato-κ2O:O′)bis[(dimethyl sulfoxide-κO)copper(II)]–α-naphthylacetic acid–dimethyl sulfoxide (1/2/2)

“…Each Cu II ion is in a ®ve-coordinate square-pyramidal environment, with the basal plane being de®ned by the O atoms of four bridging bidentate carboxylate groups of naphthylacetate ligands, and the apical position occupied by the O atom of the terminal dimethyl sulfoxide molecule. The CuÐO(carboxylate) distances range from 1.950 (2) to 1.976 (2) A Ê , in good agreement with the values in other analogous Cu II dimers (Battaglia et al, 1981;Kani et al, 1998). The CuÐO(DMSO) bond length of 2.160 A Ê , close to the values in a benzoate-bridged dinuclear unit with similar geometry (Melnik et al, 1984), is slightly longer than the CuÐO(carboxylate) bonds.…”

Copper-Hydroxo Chelates of Clofibric Acid (CA): Reaction of Cu2+ with CA

“…These two protons must come from the aqua ligand attached to the metal ion as it was explained in equations 1 and 2. It is established in the literature that such hydroxo-complexes with Cu 2+ and most metal ions have been seen previously [3][4][5][6][7][8][9][10][11][12][13][14].…”

“…They also showed the dimeric (Cu) 2 (CA) 4 L 2 complexes where L is N,N-diethylnicotinamide [4]. Most of the works by Moncol and others [5][6][7] were in the solid state in which they showed the X-ray diffraction patterns of various solid Copper/CA monomer and dimer complexes.…”

Copper(ii) clofibriates, Part II. A two-dimensional coordination polymer of Cu(clofibriate)2(3-pyridylmethanol)2Part 1: ref.�1.

“…Four copper(II) clofibriate complexes were studied by X-ray diffraction methods. X-Ray diffraction analysis of [Cu 2 (clof) 4 (ampy) 2 ] (ampy ~2-aminopyrimidine) 5 and [Cu 2 (clof) 4 (MeOH) 2 ] 6 shows that the compounds are binuclear with square pyramidal geometry at each copper(II) centre. The two copper(II) atoms are bridged by four carboxylate groups in syn-syn configuration of four clofibriate anions, while the apical ligands are 2-aminopyrimidine in [Cu 2 (clof) 4 (ampy) 2 ] 5 and methanol molecules in [Cu 2 (clof) 4 -(MeOH) 2 ], 6 respectively.…”

“…X-Ray diffraction analysis of [Cu 2 (clof) 4 (ampy) 2 ] (ampy ~2-aminopyrimidine) 5 and [Cu 2 (clof) 4 (MeOH) 2 ] 6 shows that the compounds are binuclear with square pyramidal geometry at each copper(II) centre. The two copper(II) atoms are bridged by four carboxylate groups in syn-syn configuration of four clofibriate anions, while the apical ligands are 2-aminopyrimidine in [Cu 2 (clof) 4 (ampy) 2 ] 5 and methanol molecules in [Cu 2 (clof) 4 -(MeOH) 2 ], 6 respectively. The structures of [Cu(clof) 2 L 2 ], where L ~pyridine (py) 6 or nicotinamide (nia), 7 are mononuclear, and each copper(II) atom has a tetragonal-bipyramidal environment with the CuO 4 N 2 chromophore.…”