两个咪唑基d10过渡金属聚合物的离子热合成及其结构

Ionothermal syntheses and crystal structures of two d10 imidazole-based coordination rolymers

以离子液体卤化1-乙基-3-甲基咪唑盐作为反应介质,离子热合成了两个d 10过渡金属咪唑基配位聚合物[CdCl 2(MIM)2]n(1)和[ZnBr 2(EIM)2](2)(MIM=1-甲基咪唑;EIM=1-乙基咪唑).通过X-射线单晶衍射(SCXRD)确定化合物1和2的单晶结构.化合物1为1D[CdCl 2(MIM)2]n链状结构,相邻Cd(II)金属中心被2个μ2-Cl连接构成[CdCl 2]n无机链.MIM作为端基配体连接在[CdCl 2]n无机链的两侧.化合物2为一个孤立的单核化合物.化合物1和2均通过了弱C-H…X氢键、d…π堆积作用构成了3D超分子网络结构.离子液体阴离子X-进入化合物骨架结构,在离子热的合成中并不多见,并作为氢键受体在框架构成中起到了重要的作用.

This work presented two d 10 imidazole-based coordination polymers,[CdCl 2(MIM)2]n(1)and[ZnBr 2(EIM)2](1)(MIM=1-methylimidazole;EIM=1-ethylimidazole),which were synthesized under ionothermal conditions with 1-ethyl-3-methyl imidazolium halides as reaction media.The single crystal structures of compounds 1 and 2 were determined by a single crystal X-ray diffractometer.Compound 1 features a 1D[CdCl 2(MIM)2]n chain,in which a inorganic[CdCl 2]n chain was formed by two neighboring Cd(II)connecting with twoμ2-Cl ligands,and MIM ligands bind the Cd(II)center on both sides of the[CdCl 2]n chain.Compound 2 is a discreate mononuclear complex.Both compounds 1 and 2 shape 3D supramolecular networks through weak hydrogen bondings C-H…X and d…πstackings.The anion component of X-in ionic liquid can enter the coordination spheres of the metal centers,which is not common.X-also as the acceptor of hydrogen bindings plays an important role in the construction of supramecular networks.