On the structures and properties of Cr(DMSO)(6)(3+) and the coordination polymer cis-Cr(III)(oxalate)(2)(DMSO)(2) K(DMSO)(2) (n)

On the structures and properties of Cr(DMSO)(6)(3+) and the coordination polymer cis-Cr(III)(oxalate)(2)(DMSO)(2) K(DMSO)(2) (n)
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DOI:
10.1016/s0020-1693(00)00126-2
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发表时间:
2000-07
影响因子:
2.8
通讯作者:
L. Öhrström;G. Svensson
L. Öhrström;G. Svensson
中科院分区:
化学3区
文献类型:
--
作者:
L. Öhrström;G. Svensson

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在二甲基亚砜-四氢呋喃混合物中,K3 Cr(草酸盐)3形成顺式-Cr(III)(草酸盐)2(DMSO)2 K(DMSO)2。该结构是带状的,顺式-Cr(草酸盐)2(DMSO)2−络合离子通过草酸盐桥连到(DMSO)K(DMSO)2K(DMSO)单元上,形成六个金属络合物的互连环。在相同类型的溶液中,还形成Cr(DMSO)6(NO3)3。在该结构中,Cr(III)与来自DMSO的氧六配位。Cr(DMSO)_6(NO_3)_3与Fe(DMSO)_6(NO_3)_3(J.R. Tzou等人,晶体学报,C节,51(1995)2249)。与Fe(DMSO)6(NO3)3中的Fe(III)-O键相比,Cr(III)-O键距离显示出约0.04 μ m的预期缩短。
cis-Cr(III)(oxalate)2(DMSO)2K(DMSO)2was formed by K3Cr(oxalate)3in dimethylsulfoxide–THF mixtures. The structure is ribbon-like with cis-Cr(oxalate)2(DMSO)2−complex ions bridged by oxalates to (DMSO)K(DMSO)2K(DMSO) units forming interconnected rings of six metal complexes. In the same type of solutions Cr(DMSO)6(NO3)3was also formed. In this structure Cr(III) is six-coordinated by oxygens from DMSO. Cr(DMSO)6(NO3)3is isostructural with Fe(DMSO)6(NO3)3(J.R. Tzou et al., Acta Crystallogr., Sect. C, 51 (1995) 2249). The Cr(III)O distance shows an expected shortening of about 0.04 Å compared to the Fe(III)O bond in Fe(DMSO)6(NO3)3.