of the 1-methoxy (), 1-methyl (), 1-carbomethoxy (), and 1-nitro () derivatives of -7,8-dichlorodibenzobicyclo [2.2.2] octa-2,5-dienes are described. Rearranged products possessing the dibenzobicyclo [3.2.1] octadiene skeleton were identified. With compound , the P8:P7 ratio (ratio of products derived from ionizations of C8-Cl and C7-C1 bonds) was 1.3. For and , the corresponding P8 P7 ratios were 0