Question
Chemistry Question on Bond Parameters
The C−H bond distance is the longest in
A
C2H2
B
C2H4
C
C2H4Br2
D
C6H6
Answer
C2H4Br2
Explanation
Solution
As the s-character or number of π-electrons increases, bond length decreases. Therefore, C2H4Br2 due to the absence of π-electrons or due to the presence of lesser s-character (25%), has the longest C−H bond distance.