January 15, 2025, 03:43:47 AM
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Topic: Resonance structure of butadiene  (Read 280 times)

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Offline rentj

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Resonance structure of butadiene
« on: January 02, 2025, 04:39:50 AM »
Hi, I just want to confirm whether the picture attached below is one of the resonance structures of butadiene. I tried searching it in the internet but most do not include this resonance structure. I am confused whether I am right or not since this structure does not violate the octet rule.

Thanks.

Offline Meter

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Re: Resonance structure of butadiene
« Reply #1 on: January 02, 2025, 06:31:02 AM »
Does this resonance structure minimize the number of charges?

Offline rentj

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Re: Resonance structure of butadiene
« Reply #2 on: January 02, 2025, 06:42:07 AM »
No, it increases instead. But, that is not my point. I saw many sources stated that the resonance structure of butadiene is a double bond between at C2 and C3, meanwhile positive charge on 1st or 4th and negative on the other. That does not minimize the number of charges as well. So once again, I want to confirm whether the structure above is a resonance structure of butadiene or not.

Offline Meter

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Re: Resonance structure of butadiene
« Reply #3 on: January 02, 2025, 06:47:35 AM »
It won't be a significant contributor, no.

Offline Babcock_Hall

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Re: Resonance structure of butadiene
« Reply #4 on: January 02, 2025, 07:08:24 AM »
IIRC the bond between C2 and C3 is shorter than a typical carbon-carbon single bond, but there are other ways to explain this fact.

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