Since the allyl radical is electronically symmetrical, it can be drawn in either of two resonance forms-with the unpaired electron on the left and the double bond on the right, or with the unpaired electron on theright and the double bond on the left. Nneither structure is correct by itself; the true structure of the allyl radical is a resonance hybrid of the two. As noted in section 2.5, the greater the number of resonance forms, the greater the stability of a compound. An allyl radical, with two resonance forms, is therefore more stale than a typical alkyl radical, which has only a single structure.