Synthesis, characterisation and X-ray crystal structure of copper(II) complexes with unsymmetrical tetradentate Schiff base ligands: first evidence of Cu(II) catalysed rearrangement of unsymmetrical to symmetrical complex

被引：96

作者：

Ray, MS

Bhattacharya, R

Chaudhuri, S

Righi, L

Bocelli, G

Mukhopadhyay, G

Ghosh, A ^{[1
]}

机构：

[1] Presidency Coll, Dept Chem, Kolkata 700073, W Bengal, India

[2] Univ Calcutta, Coll Sci & Technol, Dept Chem, Kolkata 700009, W Bengal, India

[3] Bose Inst, RSIC, Kolkata 700009, W Bengal, India

[4] CNR, Ctr Studio Strutturist Diffrattometr, I-43100 Parma, Italy

来源：

POLYHEDRON | 2003年 / 22卷 / 04期

关键词：

asymmetrical tetradentate Schiff base; copper(II); X-ray crystallography; Cu(II) catalysed hydrolysis;

D O I：

10.1016/S0277-5387(02)01435-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The mononuclear copper(II) complexes, [CuL1](ClO4) (1), and [CuL2](ClO4) (2) with unsymmetrical quadridentate Schiff base ligands derived from the 1:1:1 condensation of 2,4-pentanedione, pyridine-2-carboxaldehyde and 1,2-ethanediamine (HL1) or 1,3-propanediamine (HL2) have been prepared and characterised. Complex 2 undergoes Cu(II)/H+ catalysed rearrangement to [CuL3](ClO4)(2) (3) where L-3 is a symmetrical tetradentate Schiff base involving 1,3-propanediaimine and pyridine-2-carboxaldehyde. Structures of all the three compounds have been verified by single crystal X-ray analysis. The geometry around Cu(II) is square-planar in 1 and 2 whereas that in 3 is distorted octahedral with two axially coordinated perchlorate ions. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：617 / 624

页数：8