Nonclassical selenoloselenophens
Abstract
Evidence for the existence of nonclassical selenoloselenophens, the 4,6-dimethyl- and 4,6-diethoxycarbonylselenolo[3,4-c]selenophens (1b) and (1c), which appear to be more stable than the corresponding thieno-[3,4-c]thiophens, has been obtained.