Synthesis and studies of rare acylhydrazine bridged strong antiferromagnetically coupled dicopper(II) and dioxovanadium(V) complexes of a pyridyl-pyrazole derived Schiff base ligand

被引：11

作者：

Jana, Atanu ^{[2
]}

Konar, Saugata ^{[2
]}

Mandal, Tarak Nath ^{[3
]}

Das, Kinsuk ^{[4
]}

Ray, Sangita ^{[2
]}

Sarkar, Ananda ^{[5
]}

Liu, Cai-Ming ^{[1
]}

Kar, Susanta Kumar ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[2] Univ Calcutta, Univ Coll Sci, Dept Chem, Kolkata 700009, India

[3] Korea Res Inst Chem Technol, Taejon 305606, South Korea

[4] Haldia Govt Coll, Dept Chem, Debhog 721657, Purba Midnapur, India

[5] APC Coll, Kolkata 700131, India

来源：

POLYHEDRON | 2012年 / 46卷 / 01期

关键词：

Coordination; Acylhydrazine; Binuclear copper complex; Binuclear oxovanadium complex; Crystal; Magnetism; DFT; EFFECTIVE CORE POTENTIALS; OXOVANADIUM(V) COMPLEXES; MOLECULAR CALCULATIONS; CRYSTAL-STRUCTURES; HYDRAZONE LIGANDS; VANADIUM; CHEMISTRY; REACTIVITY; SERIES;

D O I：

10.1016/j.poly.2012.07.076

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A binuclear acylhydrazine bridged Cu(II) complex, [Cu-2(L)(NO3)(3)(H2O)] (1), and an anti-orthogonal binuclear oxovanadium(V) complex, [V2O4(L)(2)] (2), have been synthesized and characterized spectroscopically and crystallographically. The ligand HL has two potentially bridging functional groups (mu-O, mu-N-N) and consequently can exist in the following coordination conformers: (a) metal centers bridged by mu-O, (b) metal centers bridged by mu-N-N. A rare acylhydrazine bridged (a) type configuration exists in the dinuclear Cu(II) complex 1. The bridging ligand mediates a strong antiferromagnetic coupling (J = -99 cm(-1)). The exchange pathway parameters have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings (J = -93.96 cm(-1)). Molecule 2 has a centrosymmetric structure with each vanadium center having a distorted octahedral geometry. It shows a one step irreversible reduction at +0.43 V. The bond angles, bond lengths and torsion angles in 2 are correlated with DFT. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：105 / 112

页数：8

共 42 条

[1] Synthesis and spectroscopic characterisation of copper(II) complexes with 5-methyl-1-(2′-pyridyl) pyrazole-3-carboxamide (MPyPzCA):: X-ray crystal structure of [Cu(MPyPzCA)2(H2O)](ClO4)2 [J].