8.77


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KarenaKaing_1D
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8.77

Postby KarenaKaing_1D » Sat Jan 23, 2016 8:31 pm

What is benzene? And what are the Kekule structures?

DEVIKA CHANDRAMOHAN 1I
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Re: 8.77

Postby DEVIKA CHANDRAMOHAN 1I » Sat Jan 23, 2016 9:45 pm

Benzene is the organic compound with the chemical formula C6H6. The Kekule structure (the model for benzene suggested by Kekule) is drawn as 6 carbons in a ring (3 double bonds, 3 single bonds, alternating) with 1 hydrogen coming off of each one. This results in the bond enthalpy of the carbons being 3(348 kJ for C=C) + 3(612 kJ for C-C). If we allow for resonance, looking at table 8.7, we see the bond enthalpy for the carbons is 6(518 kJ C--C).

I hope that helps!


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