Adjective
of or pertaining to the allyl radical
Source: WordNetFree radical reactions When placed in benzylic or allylic positions, the strength of the C-H bond is decreased, and the reactivity of the methyl group increases. Source: Internet
The rubber precursor is isopentenyl pyrophosphate (an allylic compound), which elongates by Mg 2+ -dependent condensation by the action of rubber transferase. Source: Internet