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Eliminations 1: Carbene, Alkene & Ring Formation
Eliminations usually proceed to form alkenes, alkynes, imines or ketones etc, if the Efg and Nfg are on adjacent atoms, however, they eliminations can also generate carbenes and ring systems. (Note that 4 membered rings and ring sizes >7 are difficult to form.)

For more information look in the Chemogenesis webbook sections on fragmentation reactions and elimination reactions.