Magnetostructural characterization of μ4-oxohexa-μ2-chlorotetrakis(imidazole)copper(II)

Ana María Atria, Andrés Vega, Martín Contreras, Jorge Valenzuela, Evgenia Spodine

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

The [Cu4OCl6(IMIDH)4] complex has been synthesized and its crystal structure and magnetic properties determined. The compound crystallizes as a dark green solid in the orthorhombic system, space group P212121, with cell constants a = 11.469(2) Å, b = 13.933(2) Å, c = 16.778(3) Å and four formula units per cell. The complex has a tetrameric structure of four copper(II) ions connected to a central oxo group, in an approximately tetrahedral arrangement. Copper coordination is completed by three μ2-chloride ions and an imidazole nitrogen atom, defining a trigonal bipyramidal environment around each copper ion. A new Heisenberg exchange scheme has been developed, considering the experimentally observed distortion of the Cu4 tetrahedron. The magnetic susceptibilities measurements were interpreted by means of this model, in terms of three coupling constants, J = -7.65 cm-1, JS = 83.3 cm-1, and JL = -58.8 cm-1, which show a linear correlation with the observed Cu-O-Cu angles.

Original languageEnglish
Pages (from-to)5681-5685
Number of pages5
JournalInorganic Chemistry
Volume38
Issue number25
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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