...
首页> 外文期刊>Crystallography reports >Crystal structure of calcium bis(nitrilotriacetato)di(mu-hydroxo)dichromate(III) hexahydrate, Ca[(Nta)Cr(mu-OH)(2)Cr(Nta)] center dot 6H(2)O
【24h】

Crystal structure of calcium bis(nitrilotriacetato)di(mu-hydroxo)dichromate(III) hexahydrate, Ca[(Nta)Cr(mu-OH)(2)Cr(Nta)] center dot 6H(2)O

机译:六水合双(三硝基三乙酸根)二(重羟基)重铬酸钙(III)的晶体结构,Ca [(Nta)Cr(mu-OH)(2)Cr(Nta)]中心点6H(2)O

获取原文
获取原文并翻译 | 示例
           

摘要

The compound Ca[(Nta)Cr(mu-OH)(2)Cr(Nta)] center dot 6H(2)O is synthesized, and its X-ray structure analysis is performed [R-1 = 0.0285, wR(2) = 0.0766 for 4330 reflections with I > 2 sigma(I)]. The crystals are built of centrosymmetric dimeric anionic complexes {[Cr(Nta)(mu-OH)](2))(2-), cationic [Ca(H2O)(3)](2+) fragments, and crystallization water molecules, which are linked into a three-dimensional framework. Two independent anionic complexes have similar structures but differ in the mode of binding with Ca atoms, water molecules, and adjacent anions. Distorted octahedral environments of the Cr atoms are formed by four atoms (N + 3O) of the Nta(3-) tetradentate chelate ligand and two oxygen atoms of the bridging OH- ligands. The Cr-O-Cr bridges have symmetric structures [Cr-O, 1.944-1.96](2) angstrom]. The Ca environment includes seven oxygen atoms of three water molecules and four anionic complexes [Ca-O, 2.397-2.430(3) angstrom]. (C) 2005 Pleiades Publishing, Inc.
机译:合成化合物Ca [(Nta)Cr(mu-OH)(2)Cr(Nta)]中心点6H(2)O,并进行X射线结构分析[R-1 = 0.0285,wR(2 )= 0.0766,用于4330次反射,I> 2 sigma(I)]。晶体由中心对称二聚阴离子络合物{[Cr(Nta)(mu-OH)](2))(2-),阳离子[Ca(H2O)(3)](2+)片段和结晶水分子组成,它们链接到三维框架中。两个独立的阴离子络合物具有相似的结构,但与Ca原子,水分子和相邻阴离子的结合方式不同。 Cr原子的扭曲八面体环境由Nta(3-)四齿螯合配体的四个原子(N + 3O)和桥接OH-配体的两个氧原子形成。 Cr-O-Cr桥具有对称结构[Cr-O,1.944-1.96](2)埃。 Ca环境包含三个水分子的七个氧原子和四个阴离子络合物[Ca-O,2.397-2.430(3)埃]。 (C)2005年Pleiades Publishing,Inc.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号