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Grade:

                        

please explain C2H4 hybridization. Why can't carbon have a fourth bond with another carbon to satisfy the octet rule?

7 years ago

Answers : (1)

Godfrey Classic Prince
633 Points
							

Dear Akshaya K.

Ethylene,H2C=CH2 is sp2 hybridised. Like you said,carbon atom certainly can have a fourth bond with another carbon atom if the carbon atom joining in has 3 bonds already satisfied by hydrogen atoms then the resulting molecule is propane,CH3-CH2-CH3 which is an alkane and which satisfies the octet rule. Otherwise each carbon atom in Ethylene,H2C=CH2 can be attacked by a hydrogen resulting in Ethane,C2H6 which also completes the 2n+2 rule making it an alkane and it satisfies the octet rule too. 

But,Ethylene is unstable and for it to be stable and satisfy the octet rule it wants a fourth bond.

 

Hope you got it..!!

All the Very Best & Good Luck to you ...!

 

Best Regards,

AskIITians Expert,

Godfrey Classic Prince

IIT-M

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7 years ago
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