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The C-C distance in ethane is...

The `C-C` distance in ethane is

A

`154 "pm"`

B

`139 "pm"`

C

`134"pm"`

D

`120 "pm"`

Text Solution

Verified by Experts

The correct Answer is:
C
The `C=C` bonds of alkenes are stronger than the `C-C` bonds of alkanes. Stronger bonds have shorter bond lengths. In the stronger `C=C` bond, `4` electrons shield the bonding carbon atoms permitting closer approach to their positively charged nuclei than in the `C-C` bond shielded by only two electrons.
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