Magnetostructural Characterization of 4-Oxohexa-2
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- 作者：Ana Marí ; a Atria ; André ; s Vega ; Martí ; n Contreras ; Jorge Valenzuela ; and Evgenia Spodine
- 刊名：Inorganic Chemistry
- 出版年：1999
- 出版时间：December 13, 1999
- 年：1999
- 卷：38
- 期：25
- 页码：5681 - 5685
- 全文大小：63K
- 年卷期：v.38,no.25(December 13, 1999)
- ISSN：1520-510X
文摘
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 cellconstants a = 11.469(2) Å, b = 13.933(2) Å, c = 16.778(3) Å and four formula units per cell. The complex hasa tetrameric structure of four copper(II) ions connected to a central oxo group, in an approximately tetrahedralarrangement. Copper coordination is completed by three 
2-chloride ions and an imidazole nitrogen atom, defininga trigonal bipyramidal environment around each copper ion. A new Heisenberg exchange scheme has beendeveloped, considering the experimentally observed distortion of the Cu4 tetrahedron. The magnetic susceptibilitiesmeasurements 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.
2-chloride ions and an imidazole nitrogen atom, defininga trigonal bipyramidal environment around each copper ion. A new Heisenberg exchange scheme has beendeveloped, considering the experimentally observed distortion of the Cu4 tetrahedron. The magnetic susceptibilitiesmeasurements 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.