Reaction conditions were optimized for complex If and include the following variables:(1) irradiation with a 150-W Xe arc lamp was found to be superior to Hg arc sources;(2) a glass filter with half-maximum absorption at 345 nm was found to protect the product from photochemical degradationlo and to insure selective irradiation of the lowest-energy electronic band of the siloxycarbene complexes at A,= 360 nm; and (3) the presence of 5 ...
