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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Synthesis, structural characterization and solvent effect of copper(II) complexes with a variational multidentate Salen-type ligand with bisoxime groups
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Synthesis, structural characterization and solvent effect of copper(II) complexes with a variational multidentate Salen-type ligand with bisoxime groups

机译:具有双肟基变变多齿Salen型配体的铜(II)配合物的合成,结构表征和溶剂作用

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Four new solvent-induced Cu(II) complexes with the chemical formulae [{Cu(HL)(CH3OH)}(2)Cu] center dot CH3OH (1), [{(Cu(HL))(2)(CH3CH2OH)(2)}Cu] (2), [{CuL(H2O)}(2)Cu-2] center dot 2CH(3)CH(2)CH(2)OH (3) and [{(Cu(HL))(2)(CH3CH2CH2CH2OH)(2)} Cu] (4), where H4L = 6,6'-dihydroxy-2,2'-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol, have been synthesized and characterized by elemental analyses, H-1 NMR, FT-IR, UV-Vis spectra, TGDTA, molar conductances and X-ray crystallography. Complexes 1, 2 and 4 have an elongated square-pyramidal geometry with an unusually long bond from the penta-coordinated Cu(II) centres to the oxygen atoms of the apically coordinated solvent (methanol, ethanol or n-butanol) molecules for the terminal Cu(II) ions, and a square planar geometry distorted tetrahedrally for the central Cu(II) ion. In complex 3, the terminal Cu(II) ions have trigonal bipyramidal coordination geometries constituted by equatorial O2N donor sites, with one oxygen atom from one of the coordinated water molecules and one nitrogen atom from a completely deprotonated L4- ligand unit in the axial positions, and the central Cu(II) ions are in slightly tetrahedrally distorted square planar geometries constituted by four phenoxo oxygen donors from two completely deprotonated L4(-) ligand units, and these form a tetrametal Cu-O-Cu-O-Cu-O-Cu-O eight-membered ring. These four complexes exhibit strong hydrogen bonding interactions in the solid state. Moreover, co-crystallizing n-propanol molecules link two other adjacent complex molecules into a self-assembled infinite 2D supramolecular structure via the intermolecular hydrogen bonds in complex 3.
机译:四个新的溶剂诱导型Cu(II)配合物,其化学式为[{Cu(HL)(CH3OH)}(2)Cu]中心点CH3OH(1),[{(Cu(HL))(2)(CH3CH2OH) (2)} Cu](2),[{CuL(H2O)}(2)Cu-2]中心点2CH(3)CH(2)CH(2)OH(3)和[{(Cu(HL) )(2)(CH3CH2CH2CH2OH)(2)} Cu](4),其中H4L = 6,6'-二羟基-2,2'-[亚乙二氧基二氧基双(亚硝基甲基二炔)]二酚已合成并通过元素分析H -1 NMR,FT-IR,UV-Vis光谱,TGDTA,摩尔电导和X射线晶体学。配合物1、2和4具有细长的方金字塔形几何结构,从五配位的Cu(II)中心到末端配位的配位溶剂(甲醇,乙醇或正丁醇)分子的氧原子具有异常长的键Cu(II)离子和方形平面几何形状对中心Cu(II)离子呈四面形扭曲。在配合物3中,末端Cu(II)离子具有赤道O2N供体位点构成的三角双锥体配位几何结构,其中一个配位水分子中的一个氧原子和一个完全去质子化的L4-配体单元中的氮原子在轴向位置,并且中心Cu(II)离子处于由四个完全脱质子化的L4(-)配体单元的四个苯氧基氧供体组成的略呈四面体扭曲的方形平面几何形状,它们形成了四金属Cu-O-Cu-O-Cu-O -Cu-O八元环。这四种络合物在固态状态下显示出很强的氢键相互作用。此外,共结晶的正丙醇分子通过配合物3中的分子间氢键将另外两个相邻的配合物分子连接成自组装的无限二维超分子结构。

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