SEARCH Articles Figures Tables Alkenes 2 + 3]-cycloaddition reactions Alkenes 2+2]cycloaddition Alkenes dimerization Alkenes dimerizations Alkenes photochemical Alkenes photochemical reactions Alkenes, cycloadditions Cycloaddition reactions photochemical Cycloadditions dimer Cycloadditions photochemical reaction Dimeric alkenes Dimerization reactions Dimerization reactions 3 + 2] cycloaddition Dimerization, alkenes photochemical Dimerization, photochemical Photochemical -cycloadditions