摘要
分别以丙酮和乙腈为溶剂重结晶得到了结构不同的两种(Bu4N)[Ni(dmit)2]化合物,使用红外光谱、单晶X-射线衍射手段对所得到的化合物进行了结构表征.结果表明化合物1属于单斜晶系,空间群为P21/c,a=20.159(4),b=13.394(3),c=12.169(3),相邻的[Ni(dmit)2]-阴离子通过侧边较弱的S…S相互作用堆积成独立的柱状结构,阴离子柱平行排列形成阴离子层,四丁基铵阳离子填充在阴离子层之间.化合物2属于三斜晶系,空间群为P-1,a=11.7076(9),b=12.1072(9),c=12.3673(10),与化合物1不同的是,在化合物2的堆积结构中,相邻的[Ni(dmit)2]-阴离子沿着分子短轴方向有了一定的旋转.
Two [ Ni (dmit)2 ]^ -polymorphs with different crystal structures are obtained by synthesis in different solvents. The results show that Crystal 1 is crystallized in the monoclinic space group P21/c, a = 20. 159 (4)A, b =13. 394 ( 3 ) A, c = 12. 169 ( 3 ) 4. In the structure of crystal 1, the [ Ni (dmit) 2 ] ^- anions form a column via intermolecular S…S contacts, and the inter-anionic layers are filled with cationic. Crystal 2 belongs to triclinic space group P-1, a = 11. 7076 (9) 4, b = 12. 1072 (9) A, c = 12. 3673 ( 10 ) 4. Different from 1, for 2, the [ Ni (dmit) 2 ] ^- anions are arranged with a rotation manner along the short molecular axis.
出处
《南京晓庄学院学报》
2010年第6期62-65,共4页
Journal of Nanjing Xiaozhuang University
关键词
DMIT
分子导体
晶体结构
红外光谱
Dmit
molecular conductivity
erystal structure
infrared spectra