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

doi:10.1016/S0277-5387(00)83013-2

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

Inorganic and Analytical Chemistry

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Abstract

Dinuclear copper(II) complexes bridged by chloranilate (C1DHBQ^2-) or bromanilate (BrDHBQ^2-) 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 ClDHBQ^2- with a Cu---Cu separation of 7.661 Å. The configuration about each copper atom is square pyramidal, with two oxygens of ClDHBQ^2- 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 language	English
Pages (from-to)	933-938
Number of pages	6
Journal	Polyhedron
Volume	13
Issue number	6-7
DOIs	https://doi.org/10.1016/S0277-5387(00)83013-2
Publication status	Published - Jan 1 1994

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/S0277-5387(00)83013-2

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@article{f9d0fd6118aa47ef93ba85983f6b2d40,

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

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 {\AA}. 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.",

author = "Chiho Fujii and Minoru Mitsumi and Masahito Kodera and Motoda, {Ken Ichiro} and Masaaki Ohba and Naohide Matsumoto and Hisashi Okawa",

year = "1994",

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doi = "10.1016/S0277-5387(00)83013-2",

language = "English",

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T1 - Structure and magnetic properties of new dinuclear copper(II) complexes bridges by chloranilate or bromanilate dianions

AU - Fujii, Chiho

AU - Mitsumi, Minoru

AU - Kodera, Masahito

AU - Motoda, Ken Ichiro

AU - Ohba, Masaaki

AU - Matsumoto, Naohide

AU - Okawa, Hisashi

PY - 1994/1/1

Y1 - 1994/1/1

N2 - 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.

AB - 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.

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JO - Polyhedron

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SN - 0277-5387

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ER -

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

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