含有大的吸电子取代基化合物GeR_2Cl_2(R=Ar,Ar′和Ar″)的合成、晶体结构与^(19)F NMR  

Synthesis,Structures and ^(19)F NMR of SnR_2Cl_2 [R=2,4,6-(CF_3)_3C_6H_2,2,6-(CF_3)_3C_6H_3,2,4-(CF_3)_3C_6H_3]

作　　者：薛宝玉[1] 李文锋[1] 陈羽飞[1] 樊燕鸽[1] Keith B.Dillon 

机构地区：[1]河南省科学院化学研究所,郑州450002 [2]Chemistry Department,University of Durham

出　　处：《河南科学》2012年第8期1029-1032,共4页Henan Science

摘　　要：GeCl4与ArLi和Ar′Li(Ar″Li与Ar′Li 1∶1的混合物)反应生成化合物GeAr2Cl2,GeArCl3和GeAr″2Cl2,测定了GeAr2Cl2和GeAr″2Cl2的晶体结构,并进行了19F NMR表征.Variation in the position of CF3 groups in several synthesized aromatic Ge compounds has been studied by 19F NMR spectroscopy. The compounds may be formulated as GeAr2Cl2, GeArCl3 and GeAr″2Cl2, Ar=2,4, 6- （CF3） 3C6H2, At′ =2, 6- （CF3） 2C6H3, Ar″ =2, 4- （CF3） 2C6H3. At, At′ and Ar″ are all bulky, strongly electron-withdrawing ligands. 19F NMR studies of the variation in position of CF3 substituents in these compounds as revealed by chemical shifts may be correlated with intra-molecular Ge … F interactions derived from single-crystal X-ray diffraction data. These interactions are considered to play an important role in the stabilization of these compounds.

关 键 词：大的吸电子基 Ar=24  6-(CF3)3C6H2 Ar′=2 6-(CF3)2C6H3 Ar″=24 -(CF3)2C6H3 GeAr2Cl2 GeAr2′Cl2 19F NMR 

分 类 号：O627.4[理学—有机化学]