Results and Discussion 3, 3-Tetramethylene-l, 2-dioxetane (l), 3, 3-pentamethylene-l, 2- dioxetane (2), 3, 3-hexamethylene-l, 2-diox-etane (3), cis-4-tert-butylcyclohexanespiro-3'-(1', 2'-dioxe-tane)(4), and 4-methylcyclohexanespiro-3 '-(1', 2'-dioxe-tanes) 5a and 5e were synthesized in approximately 10% yield by closure of the corresponding bromo hydroperoxides 6-1 1 with base at low temperature. The dioxetanes were purified to ...