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Synthesis, characterization and crystal structures of dinuclear macrocyclic Schiff base copper(I) complexes bearing different bridges

Authors
Journal
Polyhedron
0277-5387
Publisher
Elsevier
Publication Date
Volume
29
Issue
17
Identifiers
DOI: 10.1016/j.poly.2010.08.031
Keywords
  • Dicopper(I) Complexes
  • X-Ray Structure
  • 20-Membered Macrocyclic Schiff Base
  • Benzene-1
  • 3-Dicarboxaldehyde
  • Halogen-Bridged Complexes
Disciplines
  • Chemistry

Abstract

Abstract Utilizing a new 20-membered macrocyclic Schiff base ligand with two coordination sites formed from the [2+2] condensation of 1,3-diaminopropane and benzene-1,3-dicarboxaldehyde in the presence of CuX (X = Cl −, Br −, I −) salts, air-stable dicopper(I) complexes were synthesized in acetonitrile, intramolecularly linked via two halide groups, and characterized by different physico-chemical techniques. The single crystal X-ray diffraction technique indicates these complexes consist of two N 2X 2 donor sets that have distorted tetrahedral coordination environments around the copper(I) ions. In these halogen-bridged binuclear Cu 2LX 2 systems the Cu⋯Cu separation can be controlled, as this distance is reduced on increasing the halide size and hence the X⋯X repulsion, with the rigidity of the macrocycle playing a significant role.

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