Synthesis and Crystal Structur of (4,4′-H_2bipy)[CdBr_4]·H_2O

The title compound (4,4′-H2bipy)[CdBr4]·H2O 1 has been synthesized via hydrothermal reaction and characterized by X-ray diffraction. The crystal belongs to monoclinic,space group P21/c with a=8.260(3),b=23.926(7),c=9.774(2),β=106.777(9)o,C10H12Br4CdN2O,Mr=608.26,V=1849.4(9)3,Z=4,Dc=2.185 g/cm3,S=1.005,μ(MoKα) =9.814 mm–1,F(000)=1128,R=0.0646 and wR=0.0989. The crystal structure analysis of 1 reveals that the title compound features an isolated structure,based on discrete 4,4′-H2bipy moieties and lattice water molecules which are linked by hydrogen bonds together with tetra-hedral cadmium atoms terminally coordinated by four bromine atoms.     

Synthesis, Characterization and Crystal Structure of （Z）-1-[2-（Triarylstannyl）vinyl]-1-indanols and Their Arylhalostannyl Derivatives

(Z)-1-[2-(Tri-o-tolylstannyl)vinyl]-1-indanol (1) and (Z)-1-[2-(tri-p-tolylstannyl)vinyl]-l-indanol (2) were synthesized by the addition reaction of 1-ethynylindanol with tri-o-tolyltin and tri-p-tolyltin hydride. The aryl groups in compound 1 and 2 were substituted by Br2 or I2 to yield monohalide derivatives (3-6). The compounds 1-6 were characterized by elemental analysis, ^1H NMR and FT-IR spectroscopy. The crystal structures of 1, 2 and 4 have been determined by single crystal X-ray diffraction analysis. The Sn atom in 1 and 2 exhibits a tetrahedral geometry distorted towards trigonal bipyramid due to a weak intramolecular interaction between Sn and the hydroxyl O atoms [0.2839(4) nm and 0.2744(5) nm], while the Sn atom in 4 adopts a trigonal bipyramidal geometry with a significant O→Sn(1) interaction [0.2552(5) nm].     

新型一维梯状双链配位聚合物{[Cu(malate)(2,2′-bipy)]·3H_2O}_∞的合成、晶体结构与表征

合成了铜(II)与羟基丁二酸和2,2′-联吡啶形成的配位聚合物{[Cu(malate)(2,2′-bipy)]?3H2O}∞(其中malate=羟基丁二酸根,2,2'-bipy=2,2'-联吡啶),通过X射线衍射测定了单晶结构,并进行了元素分析、红外光谱、紫外光谱、热分析等研究.配合物属单斜晶系,空间群P2(1)/c;晶胞参数a=0.70132(10)nm,b=1.9730(3)nm,c=1.18998(16)nm,β=94.551(3)°;Z=2;最终偏离因子R=0.0483.配合物中每个铜(II)原子与来自2,2'-联吡啶的两个氮原子和两个羟基丁二酸根的三个氧原子配位,形成畸变的三角双锥结构单元.每个羟基丁二酸根以R构型方式桥联两个三角双锥结构单元,沿a轴方向无限延伸形成一维链.两条平行链以面对面的方式重叠,彼此吡啶环之间存在强的π-π相互作用,加之C吡啶环—H…O羧基弱相互作用形成新颖的梯状双链结构,比邻的梯状双链又通过分子间O羟基—H…O羧基氢键沿a轴方向共同构筑了具有隧道的三维结构.