Synthesis and Characterization of a Copper(II) Complex with 6-Hydroxypicolinic Acid and 3-Picoline

Abstract

Abstract.A copper(II) complex with 6-hydroxypicolinic acid (6-OHpicH) and 3-picoline (3-pic), [Cu(6-OHpic) 2 (3-pic) 2 ] (1), was prepared by recrystallization of [Cu(6-OHpic) 2 (H 2 O) 2 ] from 3-picoline and characterized by IR spectroscopy and thermal methods (TGA/DTA and DSC). The molecular and crystal structure of 1 was determined by single-crystal X-ray structural analysis. The copper(II) ion in 1 has a tetragonally compressed octahedral coordination environment, achieved by two N,O-bidentate 6-hydroxypicolinate ligands and by two 3-picoline molecules in trans positions. The crystal structure of 1 exhibits one strong intermolecular O-HO hydrogen bond, one weak intermolecular C-HO hydrogen bond and one C-Hπ interaction. Molecules of 1 are assembled into a 2D network in the (1 0 -1) plane, giving rise to C 1 1 (8) graph-set motif. These 2D networks are further assembled into 3D architecture only by weak Van der Waals interactions. A thermogravimetric study showed the initial loss of two coordinated 3-picoline molecules in 1, followed by a complete decomposition of the compound.

Synthesis, cytotoxic and antitubercular activities of copper(II) complexes with heterocyclic bases and 3-hydroxypicolinic acid

“…Peaks of medium intensity around 1580 cm À1 are assigned to m(C@N) of the coordinated ligand, in good agreement with the N,O-chelation [19,22]. The same coordination mode was observed in previous works for some complexes containing 3-HPA as ligands [18,19,[22][23][24]. The stretching vibrations of the uncoordinated hydroxyl group of ligand appear in the range 3448-3455 cm À1 .…”

Optical and Structural Properties of TOPO/HDA Capped CuS Nanocrystals via Thermal Decomposition of Bis(N-Diisopropyldithiocarbamate)Cu(II) Complex

“…1.) revealed a one major decomposition step around 338 o C, associated with loss of organic moieties of the ligand leaving the residual weight corresponding to copper sulfide [14][15][16]. TEM, SEM and EDS studies of HDA-and TOPO-capped CuS nanocrystals are displayed in Fig.…”

Inhibitive effect of sodium (E)-4-(4-nitrobenzylideneamino)benzoate on the corrosion of some metals in sodium chloride solution

“…The noteworthy difference between the inhibition efficiencies of SNBB on iron and copper must then relate to the coordination chemistry of these metals. The Cu + ion favors complex formation with carboxylic acid derivatives mainly through one of the oxygen atoms of the carboxylic functional group (η 1 -O2C-R) [58]. Moreover, considering the electroneutrality principle, further coordination of the second oxygen atom of the carboxylate group using a bidentate O, O-chelating mode is not a favorable process for Cu + , leaving it exposed to Clattack.…”