...
首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Solid state synthesis and characterization of a triple chain calcium(II) coordination polymer showing two different bridging 4-nitrobenzoate coordination modes
【24h】

Solid state synthesis and characterization of a triple chain calcium(II) coordination polymer showing two different bridging 4-nitrobenzoate coordination modes

机译:固态合成和表征的三链钙(II)配位聚合物显示了两种不同的桥接4-硝基苯甲酸酯配位模式

获取原文
获取原文并翻译 | 示例
           

摘要

The solid state reaction of [Ca(H2O)(4)(eta(1)-4-nba)(eta(2)-4-nba)] 1 (4-nba = 4-nitrobenzoate) with 2-methylimidazole (L-2) at 100 degrees C results in the formation of a Ca(II) coordination polymer [Ca(H2O)(L-2)(4-nba)(2)](n) 2. Compound 2 was characterized by elemental analysis, spectral and thermal methods, and its structure determined. The coordination polymer 2 crystallizes in the centrosymmetric monoclinic space group P2(1) with all atoms situated in general positions and its structure consists of a central Ca(II), a monodentate 2-methylimidazole, a bridging water ligand (mu(2)-H2O), a bidentate bridging (mu(2)-eta(1):eta(1)) 4-nba ligand and a monoatomic bridging (mu(2)-eta(2)) 4-nba ligand. Each seven-fold coordinated Ca(II) in the title compound is bonded to a nitrogen atom of a terminal 2-methylimidazole (L-2) ligand, two symmetry related water molecules and four symmetry related 4-nba ligands, resulting in a distorted pentagonal bipyramidal {CaO6N} polyhedron. Due to the bridging nature of the aqua and 4-nba ligands [(2-methylimidazole)calcium(II)] units in 2 are linked into a one-dimensional coordination polymer consisting of three chains, all of which propagate along b-axis. In the triple chain coordination polymer a Ca center dot center dot center dot Ca separation of 3.8432(3) angstrom is observed between neighbouring Ca(II) ions. The oxygen atoms of the carboxylate and nitro functionalities of the 4-nba ligand and the coordinated water are involved in O-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot O interactions. A comparative Study of nine alkaline-earth 4-nitrobenzoate compounds is described.
机译:[Ca(H2O)(4)(eta(1)-4-nba)(eta(2)-4-nba)] 1(4-nba = 4-硝基苯甲酸酯)与2-甲基咪唑(L -2)在100摄氏度下导致形成Ca(II)配位聚合物[Ca(H2O)(L-2)(4-nba)(2)](n)2。化合物2通过元素分析表征,光谱和热方法及其结构确定。配位聚合物2在中心对称的单斜空间群P2(1)/ n中结晶,所有原子都位于一般位置,其结构由中心Ca(II),单齿2-甲基咪唑,桥联水配体(mu(2 )-H2O),双齿桥接(mu(2)-eta(1):eta(1))4-nba配体和单原子桥接(mu(2)-eta(2))4-nba配体。标题化合物中的每个七倍配位的Ca(II)与末端2-甲基咪唑(L-2)配体,两个对称相关的水分子和四个对称相关的4-nba配体的氮原子键合,导致扭曲五角双锥体{CaO6N}多面体。由于水和4-nba配体的桥接性质,[2中的((2-甲基咪唑)钙(II)]]单元连接到由三条链组成的一维配位聚合物中,所有这些链均沿b轴传播。在三链配位聚合物中,在相邻的Ca(II)离子之间观察到3.8432(3)埃的Ca中心点中心点中心点Ca间隔。 4-nba配体的羧酸盐的氧原子和硝基官能团以及配位水参与O-H中心点中心点中心点O,N-H中心点中心点中心点O和C-H中心点中心点中心点O的相互作用。描述了九种碱土4-硝基苯甲酸酯化合物的对比研究。

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