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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Coordination chemistry of acrylamide. 6 synthesis and coordination compounds of N-pyrazolylpropanamide - a versatile acrylamide-derived ligand
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Coordination chemistry of acrylamide. 6 synthesis and coordination compounds of N-pyrazolylpropanamide - a versatile acrylamide-derived ligand

机译:丙烯酰胺的配位化学。 N-吡唑基丙酰胺的6种合成和配位化合物-一种多用途的丙烯酰胺衍生的配体

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摘要

The syntheses, spectroscopy and single crystal X-ray structures of the multifunctional acrylamide-derived ligand N-pyrazolylpropanamide (= L) (1), and its complexes [L2CuCl2] (2) and [L4Co3Cl6] (3) with copper(II) and cobalt(II) chlorides, respectively, are described. The ligand 1 is easily obtained in one step by the reaction of pyrazole with acrylamide in a 1:1 molar ratio in the presence of trimethylbenzylammonium hydroxide as a basic catalyst. The reaction of CuCl2 center dot 2H(2)O with 1 in a 1:2 metal salt:ligand molar ratio in ethanol/-triethylorthoformate solution gave coordination compound 2. The crystal structure of 2 contains two seven-membered chelate rings formed by two nitrogen atoms of the pyrazolyl groups and two weakly coordinated carbonyl oxygen atoms of the substituted amide moieties. Two chloride ions in the axial positions complete a distorted octahedral coordination environment around the Cu-II atom. The reaction of CoCl2 center dot 6H(2)O with 1 in a 1:2 metal salt:ligand molar ratio afforded the unusual zwitterionic complex 3. The crystal structure of 3 contains a central cobalt atom in an octahedral coordination surrounded by four ligands in which two of them act as chelate ligands and the other two, coordinated via the carbonyl oxygen atoms of the amide moieties to this metal center, act as bridging ligands bonded to two CoCl3- units.
机译:多功能丙烯酰胺衍生的配体N-吡唑基丙酰胺(= L)(及其复合物[L2CuCl2](2)和[L4Co3Cl6](3)与铜(II)的合成,光谱和单晶X射线结构分别描述了氯化钴和氯化钴(II)。在氢氧化三甲基苄基铵的存在下,通过使吡唑与丙烯酰胺以1:1的摩尔比反应,可以容易地一步获得配体1。在乙醇/原甲酸三乙酯溶液中,CuCl2中心点2H(2)O与1在金属盐:配体摩尔比为1:2的反应中生成配位化合物2。2的晶体结构包含两个由两个形成的七元螯​​合环吡唑基的氮原子和取代的酰胺部分的两个弱配位的羰基氧原子。轴向位置的两个氯离子完成了围绕Cu-II原子的扭曲的八面体配位环境。 CoCl2中心点6H(2)O与1在1:2金属盐:配体摩尔比中的反应提供了不同寻常的两性离子络合物3。3的晶体结构在八面体配位体中包含一个中心钴原子,该原子在四面体中被四个配体包围它们中的两个作为螯合配体,另外两个通过酰胺基团的羰基氧原子与该金属中心配位,作为与两个CoCl3-单元键合的桥连配体。

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