Synthesis, spectral and structural characterization of Cu(II) complexes of a tridentate NNO donor Schiff base carrying a pendant benzimidazolyl arm

被引：0

作者：

Kumar, Robin ^{[1
]}

Mahiya, Kuldeep ^{[1
]}

Mathur, Pavan ^{[1
]}

机构：

[1] Univ Delhi, Dept Chem, Delhi 110007, India

来源：

INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY | 2011年 / 50卷 / 06期

关键词：

Coordination chemistry; Copper; Benzimidazoles; Schiff bases; Dopamine; Oxidase activity; METHYL PHENYL SULFIDE; COPPER(II) COMPLEXES; CRYSTAL-STRUCTURE; ASYMMETRIC EPOXIDATION; NEUROTOXIN; 6-HYDROXYDOPAMINE; IRON(III) COMPLEXES; OXIDATION; LIGANDS; ACID; GENERATION;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Three new Cu(II) complexes of a Schiff base ligand, 2-[2-(1H-benzo[d]imidazol-2-yl]ethylimino)methyl]phenol, (HL), derived from 2-aminoethylbenzimidazolyl and salicylaldehyde have been synthesized and characterized by elemental analysis and electronic and IR spectroscopy. Results show that HL acts as tridentate ligand and coordinates through the imine nitrogen of benzimidazole ring, the azomethine nitrogen and a deprotonated phenolic oxygen of the Schiff base. One of the complex with the composition [Cu(L)CH3COO] has been structurally characterized. X-ray diffraction data reveals that the compound crystallizes in monoclinic space group P-21/c, with cell parameters of a = 12.8602(8) angstrom, b = 18.1466(10) angstrom, c = 8.1250(4) angstrom, a = 90 degrees, beta = 103.757(6)degrees, gamma = 90 degrees and Z = 4. The copper(II) ion adopts a distorted square planar geometry involving the N, N and O atoms of L and an O atom of acetate anion. The four bond distances are nearly equal. Kinetics of oxidation of dopamine using molecular oxygen as an oxidant and [Cu(L)CH3COO] as catalyst has also been studied spectrophotometrically. The complex catalyses the oxidation of dopamine to dopachrome or aminochrome in methanol.

引用

页码：775 / 780

页数：6

共 54 条

[11] SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMISTRY OF A BINUCLER COPPER(II) COMPLEX OF SCHIFF-BASE DERIVED FROM 2-AMINOMETHYL-BENZIMIDAZOLE AND SALICYLALDEHYDE [J].

DAS, NN ;

DASH, AC .

POLYHEDRON, 1995, 14 (09) :1221-1227

[12] An efficient solvent free catalytic oxidation of sulfides to sulfoxides with hydrogen peroxide catalyzed by a binaphthyl-bridged Schiff base titanium complex [J].

De Rosa, Margherita ;

Lamberti, Marina ;

Pellecchia, Claudio ;

Scettri, Arrigo ;

Villano, Rosaria ;

Soriente, Annunziata .

TETRAHEDRON LETTERS, 2006, 47 (40) :7233-7235

[13] Preparation and physico-chemical characterisation of iron(III) complexes containing substituted benzimidazole and Schiff base moieties [J].

Dubey, Raj K. ;

Dubey, Uma K. ;

Mishra, Chandrakant M. .

TRANSITION METAL CHEMISTRY, 2006, 31 (07) :849-855

[14]

Farrugia L.J., 1997, J. Appl. Crystallogr., V30, P565, DOI [10.1107/S0021889897003117, DOI 10.1107/S0021889897003117]

[15]

Farrugia L. J., 1999, Journal of Applied Crystallography, V32, P837, DOI [DOI 10.1107/S0021889812029111, 10.1107/S0021889899006020, DOI 10.1107/S0021889899006020]

[16] Mononuclear Cu and dinuclear Cu-Ln complexes of benzimidazole based ligands including N and O donors: Syntheses, characterization, X-ray molecular structures and magnetic properties [J].