关键词：
镍(Ⅱ);希夫碱、模板效应、非对称的缩合
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。
译 名：
Nickel(Ⅱ)Coordination Preference Directed the Condensation Reaction of Schiff Base Ligands
作 者：
YANG Tian-tian;ZHENG Bai-Feng;XIANG Jing;College of Chemistry and Environmental Engineering Yangtze University;
关键词：
Ni(Ⅱ);;Schiff base;;template effect;;unsymmetrical condensation
摘 要：
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.
