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 sp² hybridised. 

C–2 is sp hybridised. 

(ii) 

C–1 is sp³ hybridised. 

C–2 is sp² hybridised. 

C–3 is sp² hybridised. 

(iii) 

C–1 and C–3 are sp³ hybridised. 

C–2 is sp² hybridised. 

(iv) 

C–1 is sp² hybridised. 

C–2 is sp² hybridised. 

C–3 is sp hybridised. 

(v) C₆H₆ 

All the 6 carbon atoms in benzene are sp² hybridised.