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Topic: benzene  (Read 2909 times)

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Offline nlee5687

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benzene
« on: November 14, 2007, 09:01:25 PM »
how many resonance structure does benzene have?

Is it two or four?
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Offline agrobert

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Re: benzene
« Reply #1 on: November 14, 2007, 09:19:18 PM »
Draw them.  It is two.
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Offline sjb

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Re: benzene
« Reply #2 on: November 15, 2007, 04:38:13 AM »
Quote from: agrobert on November 14, 2007, 09:19:18 PM
Draw them.  It is two.

Well, it probably has more than 2 (or even 4). The two *major* ones correspond to 1,3,5-cyclohexatriene (the Kekule forms), but you can also have forms with charge separation, and possibly even forms like Dewar benzene (with a long bond in the middle) at a stretch (no pun intended).

S
« Last Edit: November 15, 2007, 05:34:16 AM by sjb »
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