Correct order of bond length in two organic molecules

Click For Summary

Discussion Overview

The discussion revolves around determining the correct order of bond lengths in two organic molecules, with a focus on the influence of resonance on bond stability and length. Participants explore concepts related to bond length, resonance, and the application of Hückel's rules.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests that molecule x participates in resonance, leading to the conclusion that x is more stable than y, thus proposing that x
  • Another participant inquires about the application of Hückel's rules, indicating a potential relevance to the bond length discussion.
  • Responses indicate familiarity with the 4n + 2 π electron rule, but there is uncertainty about its application in this specific context.
  • One participant asserts that more resonance correlates with longer bond lengths, but this claim is met with a request for clarification on what it is being compared to.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between resonance and bond length, with some asserting that more resonance leads to longer bonds while others seek clarification on this point. The discussion remains unresolved regarding the correct order of bond lengths.

Contextual Notes

There are unresolved assumptions regarding the definitions of stability and resonance in the context of bond lengths, as well as the specific application of Hückel's rules to the molecules in question.

randomgamernerd
Messages
139
Reaction score
4

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.
 

Attachments

  • image.jpg
    image.jpg
    26.9 KB · Views: 567
Physics news on Phys.org
Do you know the Hückel rules?
 
DrDu said:
Do you know the Hückel rules?
yeah, I know..the 4n + 2 Π electron rule...right?
 
Yes, do you see how to apply it here?
 
DrDu said:
Yes, do you see how to apply it here?

no..
 
more resonance = longer bond
 
AMan24 said:
more resonance = longer bond

Compared to what?
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 28 ·
Replies
28
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 4 ·
Replies
4
Views
5K
Replies
3
Views
3K
Replies
9
Views
4K
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
6K
Replies
6
Views
2K