镍离子的配位偏好所指引的希夫碱配体的原位形成（英文）  

Nickel(Ⅱ)Coordination Preference Directed the Condensation Reaction of Schiff Base Ligands

作　　者：杨甜甜[1] 郑佰峰 向景[1] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《长江大学学报（自科版）（上旬）》2013年第11期33-38,共6页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：Natural Science Foundation of China(21201023)

摘　　要：5个单核的配合物[Ni(L1)3](ClO4)2(1),[Ni(L2)2](ClO4)2(2),[Ni(L3)2](Cl)2·H2O(3),[Ni(L4)](ClO4)2(4)and[Ni(L5)](ClO4)2(5)通过镍与相应的胺类配体在NaClO4的甲醇溶剂中用水和法得到。这些配合物的晶体结构已经通过x单晶衍射仪测得,L1、L5与镍(Ⅱ)的配合物是以镍(Ⅱ)为中心与六个氮原子的协调原位配位形成的。值得注意的是,双齿配体是L1,L2和L3三齿配体,而L4和L5是六齿配体。这些配体的配位基的数量大约是六个,这表明,一般的镍与希夫碱配体协调配位时,更偏向直接的缩合反应。Five mononuclear compounds,[Ni(L1) 3 ](ClO4) 2(1),[Ni(L2) 2 ](ClO4) 2(2),[Ni(L3) 2 ](Cl) 2 ·H2 O(3),[Ni(L4)](ClO4) 2(4)and[Ni(L5)](ClO4) 2(5)are obtained from one-pot reaction of hydrated NiCl2,acteylpyridine(ACPY)and corresponding amine in MeOH in the presence of NaClO4. The crystal structures of these compounds are determined by X-ray crystallography.The Ni(Ⅱ)centers are coordinated by six nitrogen atoms from the in-situ formed ligands L1-L5.It is noteworthy that L1 is a bidentate ligand,L2 and L3 are the tridentate ligands,whereas the L4 and L5 are the hexadentate ligands.The dentate number of these ligands is submultiple of six,which indicate that the condensations of ACPY with diamines are readily controlled by the coordination preference of nickel(Ⅱ)ion.

关 键 词：镍(Ⅱ) 希夫碱、模板效应、非对称的缩合 

分 类 号：O641.4[理学—物理化学]