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Topic: Resonance structures... doubts  (Read 1428 times)

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Offline ve_90

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Resonance structures... doubts
« on: October 23, 2023, 05:59:17 AM »
How can I write the resonance structures of these unusual species?
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Offline rolnor

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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
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Offline rolnor

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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
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Offline rolnor

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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
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Offline Babcock_Hall

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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. 
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Offline rolnor

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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.
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