Two [Ni(dmit)_2]^- Compounds Showing Layered and Chain Alignments: Crystal Structures and Magnetic Properties  

作　　者：ZHANG Hui YUAN Guo-Jun LIU Shao-Xian DUAN Hai-Bao 

机构地区：[1]School of Environmental Science,Nanjing Xiaozhuang College [2]School of Chemical and Engineering,Anhui Huangshan University

出　　处：《Chinese Journal of Structural Chemistry》2016年第2期271-278,共8页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China;Natural Science Foundation of High Learning Institutions of Anhui Province;Science Supported Foundation of Nanjing Xiaozhuang College(No.21201103,KJ2012ZD11 and 2014XZRC01)

摘　　要：Two metal-dithiolene compounds with a formula of[4-ClBz-l-APy][Ni（dmit）2]（1）and[4-NO2Bz-l-APy][Ni（dmit）2]（2,4-ClBz-1-APy = 1-N-（4＇-chlorobenzyl）pyridinium,4-NO2Bz-1-APy = l-N-（4＇-nitrobenzyl）pyridinium,dmit^（2-）= 1,3-dithiole-2-thione-4,5-dithiolate） were synthesized and characterized.Two compounds crystallize in triclinic space group P1 and P1,respectively,but with different cell parameters and packing structures.The[Ni（dmit）2]^- anions and cations of 1 form mixed column stacks along the a axis and alternately layered alignments in the crystal of 2,which are parallel to the crystallographic（110） plane.Two compounds show a similar magnetic behavior,the magnetic exchange natures are mainly antiferromagnetic,and the magnetic susceptibility data can be fitted to the simple Curie-Weiss law.For 1 and 2,the fitted Curie constants are much less than the spin-only value expected for an S =1/2 system,and the fitted Weiss constants marking magnetic interaction are also very smaller.This fact implies that the weak CurrieWeiss-type paramagnetism is not the intrinsic characteristics of two compounds.Two metal-dithiolene compounds with a formula of[4-ClBz-l-APy][Ni（dmit）2]（1）and[4-NO2Bz-l-APy][Ni（dmit）2]（2,4-ClBz-1-APy = 1-N-（4＇-chlorobenzyl）pyridinium,4-NO2Bz-1-APy = l-N-（4＇-nitrobenzyl）pyridinium,dmit^（2-）= 1,3-dithiole-2-thione-4,5-dithiolate） were synthesized and characterized.Two compounds crystallize in triclinic space group P1 and P1,respectively,but with different cell parameters and packing structures.The[Ni（dmit）2]^- anions and cations of 1 form mixed column stacks along the a axis and alternately layered alignments in the crystal of 2,which are parallel to the crystallographic（110） plane.Two compounds show a similar magnetic behavior,the magnetic exchange natures are mainly antiferromagnetic,and the magnetic susceptibility data can be fitted to the simple Curie-Weiss law.For 1 and 2,the fitted Curie constants are much less than the spin-only value expected for an S =1/2 system,and the fitted Weiss constants marking magnetic interaction are also very smaller.This fact implies that the weak CurrieWeiss-type paramagnetism is not the intrinsic characteristics of two compounds.

关 键 词：metal-bis-dithiolene compound crystal structure magnetic property 

分 类 号：O627.8[理学—有机化学]