Which of the following distinct chemical systems are capable of extended resonance delocalization (c — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Benzene, 1,3-butadiene, and the allyl cation all feature unbroken parallel unhybridized p-orbitals allowing continuous delocalization. 1,4-pentadiene possesses a central $sp^3$ hybridized carbon atom (an insulating group) that breaks the conjugation.