论文部分内容阅读
The diiodotetrafluoroethane I(CF2)2I and its derivatives I(MF2)nI(M = C,Si,Ge,Sn)have been widely used in the field of liquid crystal [1].In this work,the regions of positive electrostatic potentials(σ-hole)outside the iodine in I(MF2)nI along the extension of the C-I bond have been discovered.