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2 Jul 2008 15:35:50 IST

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explain how the aromacity incrises &explain in bengene,napthalin,anthacine

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explain how the aromacity incrises &explain in bengene,napthalin,anthacine

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srikrish

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Joined: 30 Jun 2008

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2 Jul 2008 15:56:48 IST

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more is the number of resonating structures more will be the aromaticity...

more the no. of pie bonds in conjugation more is the no of resonating structures...

benzene has 6 pie electrons in conjugation, naphthalien has 10, anthracin has 14

so the order of aromaticity is :

anthracin > naphthalien > benzene

MOHTERSCHOOL

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Joined: 23 Apr 2008

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2 Jul 2008 16:05:57 IST

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LOL...bengene nahi hota its benzene!
and its increases n nt incrises!

Saurabh Sood

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2 Jul 2008 18:24:43 IST

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Aromaticity is a condition in which 4n+2 pi electrons are localised in a ring, in which all carbon atoms are planar. if the groups, which have lone pairs are attached to the benzene ring, and the condidions of aromaticity are satisfied, then the aromaticity will increase.

Eg. In Nitrobenzene, the number of pi electrons are 10, which means that it is aromatic. therefore aromaticity is increased.

Also, aromaticity of benzene and toulene remains same, as CH3 gp has no lone pair. One prmary condition is that the lone pair must be effectively localised into the ring.

napthalene has 10 pi electrons and anthracine has 14 pi electrons.

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