SEARCH Articles Figures Tables 2-Substituted alkyl 3- 5-Hexenyl radical cyclization alkyl substituted Alkyl Substituted 5-Hexenyl Radicals Alkyl radicals Alkyl radicals halo-substituted Alkyl radicals halogen substituted Alkyl substitute Alkyl-substituted amino radicals Radical alkylation Radicals 3-substituted Substituted Alkyl Radical Clocks Substitution alkylation Substitution radical