Intramolecular addition in hex-5-enyl, hept-6-enyl, and oct-7-enyl radicals

Abstract

Each of the radicals, hex-5-enyl, hept-6-enyl, and oct-7-enyl, undergoes intramolecular addition preferentially in that direction which affords the cyclo-alkylcarbinyl radical, because both enthalpy and entropy factors are more favourable; an approximate rate constant for 1,5-hydrogen atom transfer in hept-6-enyl radical has been determined.