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广西壮族自治区自然科学基金(0991293)

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Synthesis and Crystal Structure of a Cadmium(Ⅱ) Coordination Polymer:[Cd_2Cl_4(bpme)]_n·n(2H_2O)
2011年
A novel coordination polymer, [Cd2Cl4(bpme)]n·n(H2O) (1, bpme=2,5-bis(be-nzoimidazol-2-yl)pyrazine), has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal of the complex belongs to the triclinic system, space group P , with a=7.0737(9), b=8.7886(11), c=9.4561(12) , α=105.3580(10), β=94.981(2), γ=96.879(2)°, V=558.46(12) 3, Mr=714.97, Z=1, F(000)=346, Dc=2.126 g/cm3, μ=2.412 mm-1, T=296(2) K, S=1.057, R=0.0533 and wR=0.1480. According to the structural analysis, the Cd(Ⅱ) ion adopts a slightly distorted six-coordinated octahedral geometry. The Cd(Ⅱ) atoms are bridged by four Cl atoms along the a direction, forming infinite straight chains which are further constructed to generate 2D network layer structures through the μ4-N bpme ligand in the b direction, and such 2D network layer structures finally form a novel three-dimensional infinite supramolecular framework through weak π-π stacking between two network layers and hydrogen bonds.
李超柱黄学仁陈艳辉李家明蒋毅民
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