Syntheses and structural characterization of nine coordination compounds assembled from copper acetate, 3,5-dimethylpyrazole and carboxylates

Metal Complexes with Naphthalene-Based Acetic Acids as Ligands: Structure and Biological Activity

Naproxen (6-methoxy-α-methyl-2-naphthaleneacetic acid), 1-naphthylacetic acid, 2-naphthylacetic acid and 1-pyreneacetic acid are derivatives of acetic acid bearing a naphthalene-based ring. In the present review, the coordination compounds of naproxen, 1- or 2-naphthylacetato and 1-pyreneacetato ligands are discussed in regard to their structural features (nature and nuclearity of metal ions and coordination mode of ligands), their spectroscopic and physicochemical properties and their biological activities.

Synthesis, Crystal Structure and Spectral Properties of Copper(II) 2-Chloronicotinato Complexes with N-Heterocyclic Ligands

The synthesis and characterization of nine new copper(II) complexes [Cu(2-Clnic)2L2] (where 2-Clnic is 2-chloronicotinate anion, L is imidazole – Im, benzimidazole – Bim, furo[3,2-c]pyridine – FP, 2-methylfuro[3,2-c]pyridine – MFP, or [1]benzofuro[3,2-c]pyridine – BFP), [Cu(2-Clnic)2(INA)] (where INA is isonicotinamide), [Cu(2-Clnic)2(4-py)]·H2O (where 4-py is 4-methylpyridine) and [Cu2(2-Clnic)4(IQ)2] (where IQ is isoquinoline) are reported. The characterizations were based on elemental analysis, infrared, electronic and EPR spectra. The dimeric character of [Cu2(2-Clnic)4(IQ)2] is assumed on the EPR spectrum and the other spectral methods. The crystal structure of the [Cu(2-Clnic)2(Bim)2] and [Cu(2-Clnic)2(FP)2] complexes have been determined by X-ray crystal structure analysis. Both complexes exhibit the hexacoordination coordination polyhedra around copper atom that lies in the crystallographic center of symmetry. The distorted tetragonal-bipyramidal (4+2) arrangement is in good agreement with spectral data that have suggested an asymmetric chelate coordination of the carboxylic group.