Woodward Hoffmann rules – electro cyclic reactions, cycloaddition reactions [2+2 and 4+2] and sigma tropic shifts [1, 3; 3, 3 and 1, 5] FMO approach Post author By Miraj Ahmad Ansari Post date December 11, 2020 UPSC Chemistry Pericyclic Reactions Woodward Hoffmann rules – electro cyclic reactions, cycloaddition reactions [2+2 and 4+2] and sigma tropic shifts [1, 3; 3, 3 and 1, 5] FMO approach Lesson Progress 0% Complete Previous Topic Back to Lesson Next Lesson ← Classification and examples → Organic polymers-polyethylene, polystyrene, polyvinyl chloride, teflon, nylon, terylene, synthetic and natural rubber