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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
M S RAY, R BHATTACHARYA, S CHAUDHURI, L RIGHI, G BOCELLI, G MUKHOPADHYAY,
Published in Elsevier Ltd
2003
Volume: 22
   
Issue: 4
Pages: 617 - 624
Abstract
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 L3 is a symmetrical tetradentate Schiff base involving 1,3-propanediamine 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 I and 2 whereas that in 3 is distorted octahedral with two axially coordinated perchlorate ions. © 2003 Elsevier Science B.V. All rights reserved.
About the journal
JournalData powered by TypesetPolyhedron
PublisherData powered by TypesetElsevier Ltd
ISSN0277-5387
Open AccessNo