SEARCH Articles Figures Tables 1.1- Difluoro-2- ethylene 1.3- Butadienes cycloaddition reactions Butadiene reaction with Butadiene reactions Butadiene, reaction with ethylene Butadienes 2+4]-cycloadditions Cycloaddition with Ethylene cycloaddition Ethylene cycloaddition reactions Ethylene reaction with Ethylene reactions Ethylene with butadiene Ethylene, 1,1 -difluoro-2,2-dichlorointramolecular cycloadditions