Question

Which of the following compounds contain all the carbon atoms in the same hybridisation state?

(i) H – C ≡ C – C ≡ C – H

(ii) CH₃ – C ≡ C – CH₃

(iii) CH₂ = C = CH₂

(iv) CH2 = CH – CH = CH₂

Answer 1

(i) H – C ≡ C – C ≡ C – H

(iv) CH₂ = CH – CH = CH₂ 

Explanation:

(i) \[\ce{H – \overset{sp}{C} ≡ \overset{sp}{C} – \overset{sp}{C} ≡ \overset{sp}{C} – H}\]

(ii) \[\ce{\overset{sp^3}{C}H3 – \overset{sp}{C} ≡ \overset{sp}{C} – \overset{sp^3}{C}H3}\]

(iii) \[\ce{\overset{sp^2}{C}H2 = \overset{sp}{C} = \overset{sp^2}{C}H2}\]

(iv) \[\ce{\overset{sp^2}{C}H2 = \overset{sp^2}{C}H – \overset{sp^2}{C}H = \overset{sp^2}{C}H2}\]