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username5429152
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What is the difference between the kekule model of benzene and the actual benzene? Do they look the same?(thanks to any replies in advance ;D)
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Banechann
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(Original post by username5429152)
What is the difference between the kekule model of benzene and the actual benzene? Do they look the same?(thanks to any replies in advance ;D)
The delocalised model is better for three main reasons:
All bonds in benzene are of the same length (they're actually intermediate in length between a C-C bond and a C=C bond)
Benzene doesn't decolourise things such as bromine water
The enthalpy of hydrogenation of benzene is less exothermic than that predicted for cyclohexatriene

If the Kekule structure was correct, then the above points should be different:
There would be two different types of bond -- C-C and C=C -- hence two different bond lengths
Benzene would decolourise bromine water etc.
The enthalpy of hydrogenation of benzene would be equal to what is predicted for cyclohexatriene


Well, the Kekule structure implies benzene is an alkene. Benzene is not an alkene...

If benzene was an alkene, it would exhibit the properties of one, which I have stated in the second bullet-point list

Someone on student room wrote that out quite well^^

Due to the above, the kekule structure cannot be the right one. So id assume that they don't look the same structurally.
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