Chemistry Correct order of bond length in two organic molecules

[randomgamernerd]

Homework Statement

: [/B]The correct relation is:
A. x=y
B. x>y
C. x<y
D. None.
Please refer to picture attached.

Homework Equations

: [/B]As stability increases, bond length decreases. When a Π bond is delocalised i.e it takes part in resonance, stability increases.

The Attempt at a Solution

I think x takes part in resonance.
Hence x is more stable than y.
Thus x<y i.e C is correct option.

 

[DrDu]

Do you know the Hückel rules?

 

[randomgamernerd]

Do you know the Hückel rules?

yeah, I know..the 4n + 2 Π electron rule...right?

 

[DrDu]

Yes, do you see how to apply it here?

 

[randomgamernerd]

Yes, do you see how to apply it here?

no..

 

[AMan24]

more resonance = longer bond

 

[Borek]

more resonance = longer bond

Compared to what?