Primary Studies on Variation in Position of Trifluoromethyl Groups in Several Aromatic Group-14 Derivatives by<sup>19</sup>F-NMR Spectroscopy
作者:Bao Yu Xue、Keith B. Dillon
DOI:10.1002/hlca.201200389
日期:2013.6
Variation in the position of CF3 groups in several aromatic Group‐14 compounds was studied by 19F‐NMR spectroscopy. In these compounds RnECl4−n (n=1 or 2; E=Si, Ge, or Sn; R=2,4,6‐(CF3)3C6H2 (=Ar), 2,6‐(CF3)2C6H3 (=Ar′), or 2,4‐(CF3)2C6H3 (=Ar″)), Ar, Ar′, and Ar″ are all bulky, strongly electron‐withdrawing ligands. The 19F‐NMR studies of the variation in position of the CF3 substituents in these
通过19 F-NMR光谱研究了几种14族芳族化合物中CF 3基团的位置变化。在这些化合物中,R Ñ根据EC1 4- Ñ(ñ = 1或2; E =硅,锗,或Sn; R = -2,4,6-(CF 3)3 c ^ 6 ħ 2(= AR),2,6- -(CF 3)2 C 6 H 3(= Ar')或2,4-(CF 3)2 C 6 H 3(= Ar'')),Ar,Ar'和Ar''都非常笨重吸电子配体。在19通过化学位移揭示的这些化合物中CF 3取代基的位置变化的F‐NMR研究可能与中心元素E的电负性以及与单晶X射线衍射得出的分子内EF相互作用有关数据。这些相互作用被认为在稳定这些化合物中起重要作用。