科研之友
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摘要
The novel three-dimension edta-linked （edta--ethylenediamine-N,N,N＇,N＇-tetraacetate） heterometallic complex [Sba（edta）2-μ4-Co（H20）2]·5.15H2O has been synthesized and characterized by elemental analyses, FT-IR spectrum, X-ray diffraction analyses and thermogravimetry-differential scanning calorimetry （TG-DSC）. The complex crys- tallizes in the monoclinic system, space group P21/n, lattice parameters： a=0.69969（2） nm, b=2.08705（4） nm, c-- 1.08106（2） nm, β=90.031（1）°, V=1.57866（6） nm3, Z=2, Mr=1007.76, Dc=2.120 g-cm 3 F（000）=1001,μ= 2.323 mm t, the final R=0.0235 and wR--0.0629 for 3480 observed reflections [l〉2σ（l）]. In the structure each Co（II） ion is connected with Sb（III） ions bridging by four carboxylic oxygen atoms, and in each [Sb（edta）] anion, the Sb（III） ion is six coordinated by two nitrogen and four oxygen from edta ions, together with a lone electron pair at the equatorial position. In the complex, the coordination number of Co（II） ion is six and its coordination environment is composed of four carbo...
