In the Caffeine molecule, is aromaticity confined only to the 5 membered ring? The entire molecule is planar and the 6 membered ring also seems to have 6π electrons. The entire molecule has 10π electrons.(inside)
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related: https://chemistry.stackexchange.com/q/54268/102629 – cngzz1 Jan 16 '21 at 04:03
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This question does not mention anything about the 6 membered ring except that it is planar – Jan 16 '21 at 04:05
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This link has an answer: Caffeine. – Jan 16 '21 at 07:02
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You should condense the content of that link into an answer here. – Karl Jan 16 '21 at 07:17
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No. The 6 membered ring is also a part of its aromaticity.
This can be better understood by considering the Zwitterion of Caffeine.
The entire molecule is planar, conjugated and has 10π electrons(4n+2)
Reference:Slides by Nevina Keskineva