422 (1962). 3.8 at IOOO) and the AS* of the correct magnitude expected for participation. However, analysis of the products derived from 1 made it clear that double bond participation of the type expected had not occurred. The products from 1 after one solvolytic half-life were a mixture of 49% trans-3, 5-hexadienyl acetate (6), 18% 2-(A2-cyc1obutenyl) ethyl acetate (7), 29 trans-3-cyclopropylallyl acetate (8), 2 l-cyclopropylallyl acetate (9), ...