离子对电荷转移配合物[NO_2Py]_x[Co(mnt)_2]的合成、光谱和磁性表征

Synthesis,Spectra and Magnetic Properties of Ion Pair Charge Transfer Complexes Bis(1-(4-Nitrobenzyl)Pyridinium) Bis(Maleonitriledithiolato) Cobaltate(Ⅱ or Ⅲ)

合成了两种新的离子对电荷转移配合物 [NO2 Py]x[Co(mnt) 2 ],(NO2 Py =1 (4 nitrobenzyl)pyridinium ;mnt=maleonitriledithiolate;x=1or2时分别对应配合物 2和 1) ,并用元素分析和红外光谱、电喷雾质谱和固体反射电子光谱等谱学方法对两种配合物进行了表征。两种配合物在 77K到 30 0K范围内的变温磁化率结果表明 ,配合物 2是抗磁性物质 ,经Pascal′s常数校正后的配合物 1的磁化率遵循改进的Bleaney Bowers方程 ,实验值和理论计算值能很好的吻合 ,非线性最小平方二乘法拟合所得的最佳拟合参数为 :g =2 392 ,2J/k=5 9K和θ=- 4 9K ,一致性因子R=7 2 0 × 10 -9(R=∑(χobsi - χcalcdi ) 2 / ∑(χobsi ) 2 )。

Two new ion pair charge transfer complexes, x [Co(mnt) 2](NO 2Py=1 (4 nitrobenzyl)pyridinium;mnt=maleonitriledithiolate; x =1 or 2 for complex 2 or 1), were synthesized and characterized by element analysis(EA), electronic spray mass spactrum(ES MS),infrared spectrum (IR) and reflection electrolic spectra. Variable temperature magnetic susceptibilities of the complexes in range of 77-300 K indicate that complex 2 exhibits diamagnetivity complex 2, and the magnetic behavior for complex 1 obeys modification Bleaney Bowers equation,that is, χ m =[Ng 2μ 2 B/3k(T-θ)][1+(1/3) exp (-2J/kT)] -1 .The best fitting gives a good results:g=2 392,2J/k=5 9 K ,θ=-4 9 K and agreement factor R=7.20×10 -9 (R=∑(χ obs i-χ calcd i) 2/∑(χ obs i) 2).