Template synthesis and characterisation of a copper(ii) complex of a half-cyclised tetraaza ligand derived from 1,8-diaminonaphthalene, nitroethane and formaldehyde

Nita A. Lewis, Swati Ray, Goutam K. Patra, Dipankar Datta

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Reaction of Cu(BF4)2.xH2O with 1,8-diaminonaphthalene, nitroethane and formaldehyde in ethanol in the presence of triethylamine yields an air sensitive copper(II) complex of 1,3-bis (8-aminonaphthyl-1-amino)- 2-methyl- 2-nitropropane (L) as Cu(L)-(BF4)2.C2H5OH, 1. Molecular mechanics calculations coupled with the solution conductivity data indicate a distorted square pyramidal N4F coordination sphere for the copper atom in I with the fluorine atom occupying the apical position and the metal atom lifted a bit from the N4 plane. This is supported by the rhombic EPR spectra of 1 (g3 = 2.389, g2 = 2.069 and g1 = 2.023; A3 = 137.9 x 10-4 cm-1, A2 = 18.1 x 10-4 cm-1 and A1 = 17.7 x 10-4 cm-1). The complex 1 undergoes a somewhat irreversible two-electron ligand oxidation at 0.36 V vs SCE in dimethylformamide. The cyclic counterpart of 1 is not at all formed in the synthetic scheme adopted here.

Original languageEnglish (US)
Pages (from-to)991-996
Number of pages6
JournalIndian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
Volume38
Issue number10
StatePublished - Oct 1 1999

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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