Photochlorination of 1, l-dichlorocyclopropane (1) at 0-5'C in carbon tetrachloride yields 1, l, l, 3-tetrachloropropane (2) and 1, 1, 1, 3, 3-pentachloropropane (3) as major products, with lesser amounts of 1, 1, 1, 2, 3-pentachloropropane (4). Photobromination of 1 yields 1, 3- dibromo-l, l-dichloropropane(5) as the only product. Both the chlorination and bromination were shown to be radical processes, accelerated by benzoyl peroxide and ...
