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. ... A silacyclopentadiene (silole) undergoes photo-induced [2+2] cycloaddition with CS 2 to afford the corresponding β-dithiolactones. The electron transfer from singlet excited state of the silole to CS 2 is shown to play an important role in the cycloaddition reaction.