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. ... The preparations of the extremely sterically hindered olefins (12) and-(13) are described, and attempts to convert these compounds to other derivatives of tetra- -butylethylene (1) are outlined. ... TG Back, DHR Barton, MR Britten-Kelly, FS Guziec Jr.