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Title: Trigonal pyramidal CuIN4 cores assembled by a family of tetradentate N-donor Schiff bases. Substituent effects on the Cu(II/I) potential
Authors: Tocher, Derek A
Drew, Michael G B
Chowdhury, Shubhamoy
Datta, Dipankar
Issue Date: May-2003
Publisher: NISCAIR-CSIR, India
Abstract: Copper(I) complexes of 1:3 condensates of tris(2-aminoethyl)amine and p-X-benzaldehydes (X = H, Cl, NMe2 and NO2) of the type [Cu(ligand)]ClO4 are synthesised. The X-ray crystal structures of the copper(I) complexes with X = H, Cl and NMe2 are determined. In these complexes copper(I) is found to have trigonal pyramidal N4 coordination sphere with the apical N forming a longer bond (2.191-2.202Å) than the trigonal ones (2.003-2.026Å). The Cu(II/I) potentials in these complexes span a range of 0.71-0.90 V vs SCE increasing linearly with the resonance component of the Hammett σ for the para substituent X. It is concluded that trigonal pyramidal geometry is destabilising for copper (II).
Page(s): 983-989
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.42A(05) [May 2003]

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