三种酰腙类Schiff碱的锌配合物的合成、晶体结构与表征

Syntheses, Crystal Structures, and Characterization of Three Zinc Complexs with Different Acylhydrazone-Type Schiff Base Ligands

采用不同的方法合成了3种酰腙的锌配合物[Zn(Lss)(phen)(DMF)](1)、{[Zn(HLdis)]2·2CH3OH}n(2)和[Zn(Baf)2]·CH3OH(3),通过元素分析、红外光谱、紫外光谱和热重分析进行了表征,并经X射线单晶衍射分析它们晶体结构。1和3的晶体属于三斜晶系P1空间群,Zn(Ⅱ)的配位数为6;2属于单斜晶系P21/n空间群,Zn(Ⅱ)的配位数为5。3的前驱体是一种吡唑啉类化合物(C15H14N2O3,Pzl),它的晶体属于单斜晶系P21/c空间群;Pzl与锌离子配位时发生分子重排,开环产物HBaf以酰腙结构与Zn(Ⅱ)配位形成3。

Three zinc complexes,namely[Zn(Lss)(phen)(DMF)](1),{[Zn(HLdis)]2·2CH3OH}n(2)and[Zn(Baf)2]·CH3OH(3),formed from different acylhydrazone-type Schiff base ligands were synthesized by using different methods,and the compounds were characterized by IR,UV-Vis spectra and TGA.The X-ray diffraction analyses reveal that 1 and 3 crystallize in the triclinic space group P1 while 2 in monoclinic system space group P21/n.In 1 and 3,coordination number of the Zn(Ⅱ)is six,and the centric atom locate in a distorted octahedron geometry,while in 2 Zn(Ⅱ)is five-coordination in a distorted square-pyramidal geometry.The precursor of 3 is pyrazoline derivative with the formula C15H14N2O3(Pzl)crystallizing in monoclinic system space group P21/c.Due to the coordination of Zn(Ⅱ)causing the intramolecular rearrangement of Pzl,the ring open product HBaf in the form of an acylhydrazone structure coordinates with Zn(Ⅱ)to form complex 3.CCDC:1465235,1;1404501,2;1516696,3;1516192,Pzl.