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

Research output: Contribution to journalArticle

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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

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Copper
Magnetic properties
magnetic properties
copper
Ions
Oxygen
spin exchange
X ray crystallography
oxygen
crystallography
Methanol
Cations
ions
apexes
Nitrogen
methyl alcohol
Positive ions
nitrogen
cations
Atoms

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Structure and magnetic properties of new dinuclear copper(II) complexes bridges by chloranilate or bromanilate dianions. / Fujii, Chiho; Mitsumi, Minoru; Kodera, Masahito; Motoda, Ken Ichiro; Ohba, Masaaki; Matsumoto, Naohide; Okawa, Hisashi.

In: Polyhedron, Vol. 13, No. 6-7, 01.01.1994, p. 933-938.

Research output: Contribution to journalArticle

Fujii, Chiho ; Mitsumi, Minoru ; Kodera, Masahito ; Motoda, Ken Ichiro ; Ohba, Masaaki ; Matsumoto, Naohide ; Okawa, Hisashi. / Structure and magnetic properties of new dinuclear copper(II) complexes bridges by chloranilate or bromanilate dianions. In: Polyhedron. 1994 ; Vol. 13, No. 6-7. pp. 933-938.
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