Our optimized protocol was compatible with a variety of substrates, both with linear (Scheme 4, Entry 1) and branched alkyl chains (Scheme 4, Entries 1-3). Substrates with pendant cycloalkanes (Scheme 4, Entries 4-7), ethers (Scheme 4, Entry 1), and aromatic rings (Scheme 4, Entries 1, 6, 8, and 9) all reacted well. In general, cis alkene substrates were required for productive reaction; in our hands, only one trans alkene substrate (Scheme 4, Entry 9) cyclized as expected. In almost all reactions, starting material was consumed fully, and the remaining mass balance could be attributed to a linear diene side product arising from ionization and elimination of the allylic carbonate. A crystal structure of 46 (CCDC 2164073) allowed us to unambiguously establish product identity. Most substrates were designed to form 6-membered dioxasilinane products, but a 5-membered dioxasilolane product (Scheme 4, Entry 10) could be forced to form.