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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Alcoholysis/hydrolysis of 1,1 '-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)
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Alcoholysis/hydrolysis of 1,1 '-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)

机译:1,1'-羰基二咪唑的醇解/水解反应,作为制备前所未有的含咪唑的一维配位铜(II)的方法

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The use of 1,1'-carbonyldiimidazole, (im)(2)CO, for the synthesis of imidazolate (im) and/or imidazole (Him)-containing copper(II) coordination polymers is described. The [Cu-2(O2CMe)(4)(H2O)(2)]/(im)(2)CO reaction system in EtOH yields the new polymeric species [Cu(O2CMe)(im)(Him)(EtOH)](n) (1) and the known compound [Cu(im)(2)], (2), depending on the reaction conditions. A mechanism for the alcoholysis/hydrolysis of (im)(2)CO is proposed. Complex 1 comprises neutral, zigzag chains with the eta(1):eta(1):mu im(-) ligand bridging two neighbouring Cull atoms. Each square pyramidal metal centre is coordinated to two imidazolate nitrogen atoms, the pyridine-type nitrogen atom of the terminal imidazole ligand, one acetate oxygen atom and the ethanol oxygen atom. The do magnetic susceptibility data for 1 have been analysed according to the Bonner-Fisher model for an equally spaced S = 1/2 chain, revealing moderate antiferromagnetic Cu-II center dot center dot center dot Cu-II exchange interactions (J = -33.5 cm(-1) using the H = -2J Sigma S1Si+1 spin Hamiltonian). The reaction system Cu(NO3)(2)center dot 3H(2)O/(im)(2)CO in EtOH leading to the preparation of known trans-[Cu(NO3)(2)(Him)(4)] (3) is also described. With terephthalate(-2) (tp(2-)), instead of MeCO2-, in MeOH/H2O the product is the new, 1D linear coordination polymer [Cu(tp)(Him)(2)(H2O)](n)center dot 2nH(2)O (4 center dot 2nH(2)O). Adjacent square pyramidal Cu-II atoms are singly bridged by the bis-monodentate tp(2-) ligand, while two monodentate Him groups and one H2O molecule complete five-coordination at each metal centre. The chains of 1 and 4 center dot 2nH(2)O form interesting, hydrogen-bonded 3D networks. The combined work demonstrates the usefulness of (im)(2)CO in the preparation of interesting Cu-II coordination polymers which can not be obtained by the use of Him.
机译:描述了使用1,1'-羰基二咪唑(im)(2)CO合成含咪唑酯(im)和/或含咪唑(Him)的铜(II)配位聚合物。 EtOH中的[Cu-2(O2CMe)(4)(H2O)(2)] /(im)(2)CO反应系统产生新的聚合物种类[Cu(O2CMe)(im)(Him)(EtOH)] (n)(1)和已知化合物[Cu(im)(2)],(2),取决于反应条件。提出了(im)(2)CO的醇解/水解机理。配合物1包含中性之字形链,其中eta(1):eta(1):mu im(-)配体桥接两个相邻的Cull原子。每个方形锥体金属中心与两个咪唑氮原子,末端咪唑配体的吡啶型氮原子,一个乙酸氧原子和乙醇氧原子配位。根据Bonner-Fisher模型分析了等间距S = 1/2链的1的do磁化率数据,揭示了中等的反铁磁Cu-II中心点中心点中心点Cu-II交换相互作用(J = -33.5 cm(-1),使用H = -2J Sigma S1Si + 1自旋哈密顿量。在EtOH中的反应体系Cu(NO3)(2)中心点3H(2)O /(im)(2)CO导致制备已知的反式[Cu(NO3)(2)(Him)(4)]也描述了(3)。用对苯二甲酸酯(-2)(tp(2-))代替MeCO2-,在MeOH / H2O中的产物是新的一维线性配位聚合物[Cu(tp)(Him)(2)(H2O)](n )中心点2nH(2)O(4个中心点2nH(2)O)。相邻的方形金字塔形Cu-II原子由双单齿tp(2-)配体单桥连接,而两个单齿的Him基和一个H2O分子在每个金属中心完成五配位。 1和4个中心点2nH(2)O的链形成有趣的氢键3D网络。结合的工作证明了(im)(2)CO在制备有趣的Cu-II配位聚合物中的有用性,而使用He不能获得这种配位聚合物。

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