| Abstract: | Two metal-dithiolene compounds with a formula of[4-ClBz-l-APy][Ni(dmit)_2](1)and[4-NO_2Bz-l-APy][Ni(dmit)_2](2,4-ClBz-1-APy = 1-N-(4'-chlorobenzyl)pyridinium,4-NO_2Bz-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. |
