Identify the correct IUPAC names that correspond to conjugated polyenes (systems where double bonds — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Conjugated dienes have alternating double and single bonds. Buta-1,3-diene ($C=C-C=C$), Hexa-1,3,5-triene ($C=C-C=C-C=C$), and Hexa-2,4-diene are conjugated. Penta-1,4-diene ($C=C-C-C=C$) is an isolated diene.