Question

Identify the species that contains a conjugated system of a bonds. Explain your answer.
I. CH2=CH-CH2-CH=CH2
II. CH2 = CH - CH = CH - CH3​

Answer 1

Answer:

(ii)

Explanation:

(ii) is having conjugatedsystem. Delocalisation of Pi -electrons is possible in case of this(ii)nd compound. hyperconjugation is possiblein caseof this compound

Answer 2

The molecule $CH_{2} =CH -CH=CH - CH_{3}$ has conjugated double bonds. So option (II) is correct.

• An alternating double and single bond represents a conjugated system. A molecule with such an arrangement of bonds is said to be a conjugated molecule.
• In compound (I), the two double bonds are separated by more than one single bond. There are two single bonds in between the double bonds. So there is no conjugated bond system.
• In compound (II), the two double bonds are separated by only one single bond and hence it has conjugated double bonds.