GAS-PHASE REACTIONS OF 1,2-DIMETHYLCYCLOPENTENE AND OF 2,6-HEPTANEDIONE WITH OZONE - UNPRECEDENTED FORMATION OF AN OZONIDE BY OZONE TREATMENT OF A DIKETONE

Gas-phase ozonizations of 1,2-dimethylcyclopentene (1) and of 2,6-hept anedione (5) afforded in each case dimethylcyclopentene ozonide (2) in low yields. In the ozonization of 1, diketone 5 was formed as the sin gle major product, along with nine ''abnormal'' ozonolysis products wh ich were formed by oxidative cleavage of carbon-carbon single bonds.