Structure and magnetic properties of new dinuclear copper(II) complexes bridges by chloranilate or bromanilate dianions

Chiho Fujii, Minoru Mitsumi, Masahito Kodera, Ken Ichiro Motoda, Masaaki Ohba, Naohide Matsumoto, Hisashi Okawa

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21 Citations (Scopus)

Abstract

Dinuclear copper(II) complexes bridged by chloranilate (C1DHBQ2-) or bromanilate (BrDHBQ2-) dianions and end-capped with 2,2′-dipyridyl (bpy) or 1,10-phenathroline (phen), [Cu2(L)2(XDHBQ)]Y2 (L = bpy or phen; X = Cl or Br; Y = ClO4- or PF6-), were prepared as solvated (H2O or CH3OH) or unsolvated forms. The complex [Cu2(bpy)2(ClDHBQ)](PF6)2·2CH3OH has been characterized by X-ray crystallography. The crystal consists of a dinuclear cation {Cu2(bpy)2(ClDHBQ)(CH3OH)2}2+ and hexafluorophosphate ions. The two copper(II) ions are bridged by ClDHBQ2- with a Cu---Cu separation of 7.661 Å. The configuration about each copper atom is square pyramidal, with two oxygens of ClDHBQ2- and two nitrogens of bpy at the basal plane and the methanol oxygen at the apex. Magnetic studies of the complexes in the temperature range 4.2-300 K reveal a significant antiferromagnetic spin-exchange through the XDHBQ bridge. The exchange integrals are evaluated as - J = 11.7-16.3 cm-1 based on H = -2JŜ1Ŝ2.

Original languageEnglish
Pages (from-to)933-938
Number of pages6
JournalPolyhedron
Volume13
Issue number6-7
DOIs
Publication statusPublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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