Formation of Disilanes in the Reaction of Stable Silylenes with Halocarbons

Reactions of stable silylenes 1 and 2 with a variety of halogenated organic compounds have
been studied. Depending on the nature of the halocarbon, the products can be disilanes, LSiX−LSiR, or
monosilanes, LSiXR, or a mixture of both types of products. Hexachloroethane reacts with the silylenes to
give mainly the dichlorodisilane, LSiX−LSiX. The experimental results are rationalized in terms of several
related free-radical chain mechanisms.