Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Reaction of the title monosubstituted vinylsilanes with IPy 2 BF 4 /HBF 4 gives iodoalkenes through the ipso-substitution process with stereospecific retention of configuration. ... To account for the retention of configuration, TMS-group elimination is intended taking place by nucleophilic ...