May 18, 2024, 11:21:11 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Resonance structures... doubts  (Read 884 times)

0 Members and 1 Guest are viewing this topic.

Offline ve_90

  • New Member
  • **
  • Posts: 4
  • Mole Snacks: +0/-0
Resonance structures... doubts
« on: October 23, 2023, 05:59:17 AM »
How can I write the resonance structures of these unusual species?
Logged

Offline rolnor

  • Chemist
  • Sr. Member
  • *
  • Posts: 2228
  • Mole Snacks: +149/-10
Re: Resonance structures... doubts
« Reply #1 on: October 23, 2023, 08:39:48 AM »
The bottom right is 2,4-pentanedione anion. The charge is on oxygen mainly so its a enolate
Logged

Offline rolnor

  • Chemist
  • Sr. Member
  • *
  • Posts: 2228
  • Mole Snacks: +149/-10
Re: Resonance structures... doubts
« Reply #2 on: October 23, 2023, 08:41:41 AM »
The top-left is an allylic cation:

https://sv.wikipedia.org/wiki/Allylgrupp
Logged

Offline rolnor

  • Chemist
  • Sr. Member
  • *
  • Posts: 2228
  • Mole Snacks: +149/-10
Re: Resonance structures... doubts
« Reply #3 on: October 23, 2023, 08:45:14 AM »
Bottom left is vinyl chloride, here is a video of the resonsnce structures

https://youtu.be/cgnUF2hV9-s?si=eSVgjotxmcr7IemW
Logged

Offline Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Posts: 5627
  • Mole Snacks: +323/-23
Re: Resonance structures... doubts
« Reply #4 on: October 23, 2023, 10:54:49 AM »
These are not particularly unusual chemical species.  Resonance delocalization of charge is a stabilizing feature.  Don't exceed eight electrons on C, N, O, or F, and it is difficult to go wrong. 
Logged

Offline rolnor

  • Chemist
  • Sr. Member
  • *
  • Posts: 2228
  • Mole Snacks: +149/-10
Re: Resonance structures... doubts
« Reply #5 on: October 23, 2023, 04:17:08 PM »

I agree, they are often seen in org. chemistry. There are a lot of knovledge in just the wiki for this basic kind of problems.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links