Question

What are hybridisation states of each carbon atom in the following compounds? CH₂=C=O, CH₃CH=CH₂, (CH₃)₂CO, CH₂=CHCN, C₆H₆.

Answer 1

(i)

C–1 is $sp^2$ hybridised

 C–2 is sp hybridised

(ii)

C–1 is $sp^3$ hybridised.

 C–2 is $sp^2$ hybridised. 

C–3 is $sp^2$ hybridised.

(iii)

C–1 and C–3 are $sp^3$ hybridised.

 C–2 is $sp^2$ hybridised.

(iv)

C–1 is $sp^2$ hybridised.

 C–2 is $sp^2$ hybridised.

 C–3 is sp hybridised. 

(v)

All the 6 carbon atoms in benzene are $sp^2$ hybridised.