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 language | English |
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Pages (from-to) | 933-938 |
Number of pages | 6 |
Journal | Polyhedron |
Volume | 13 |
Issue number | 6-7 |
DOIs | |
Publication status | Published - Jan 1 1994 |
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry