Among the following, the compound having conjugated double bonds is

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Accepted Answer

hepta-1,6-diene : $H_{2}\ ^{7}C = C^{6}H - {CH}_{2} - {CH}_{2} - {CH}_{2} - C^{2}H = {CH}_{2}$

hepta-1,3-diene : ${CH}_{3} - {CH}_{2} - {CH}_{2} - \overset{4}{CH} = C^{3}H - C^{2}H = C^{1}H_{2}$

hepta-1,4-diene : ${CH}_{3} - \overset{6}{C}H - C\overset{5}{H} = C^{4}H - C^{3}H_{2} - C^{2}H = C^{1}H_{2}$

hepta-1,5-diene : ${CH}_{3} - \overset{6}{CH} = C\overset{5}{H} - C_{2}^{4}H_{2} - C_{2}H_{2} - C_{2}H = {CH}_{2}$

An organic compound (diene) with two double bonds separated by one single bond is termed as conjugated diene.

Sol. [Key Concept: Conjugated (alternating) double bonds]

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