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Organic Chemistry

Blazing goIITian

Joined:	31 Jan 2007
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1 Apr 2008 10:10:40 IST

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382

strongest acid!!!!!!!!

None

what is the order of acidity of o,p and m-nitrophenols

some books say it is p some say it is o.

plz xplain ur ans too

plz reply soon

urggggggggeeeeeeent!!!!!!!!!!!!!

rates assured

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dheer Bhatia

Scorching goIITian

Joined: 15 May 2007

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1 Apr 2008 10:14:35 IST

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meta is least then para than ortho max

reason; thre is intramolecular h bonding in ortho but in para itz intermolecular

hope u got it

plz rate if useful

cheers!!!

harsh _27

Blazing goIITian

Joined: 21 Apr 2007

Posts: 897

1 Apr 2008 10:25:21 IST

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Acidity of substituted phenols depends on the stability of the phenoxide anion.Thus according to the stability of anion o- > p- > m-derivative for -R or -I groups.
But in case of stability of Nitrophenols the experimental result is that p-derivative is more acidic than o-derivative which is more acidic than m-derivative.The reason is that in o-derivative the Hydrogen attached to Oxygen is in Hydrogen Bonding with Nitrogen which decreases acidity.Thus the order of acidity is para > ortho > meta-Nitrophenol.
For more details check the pKa values online.

Anand Hegde

Blazing goIITian

Joined: 12 Jun 2007

Posts: 1078

1 Apr 2008 10:31:40 IST

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this question has been discussed scores of times here

varsha valli g.

Blazing goIITian

Joined: 31 Jan 2007

Posts: 515

1 Apr 2008 11:38:50 IST

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tnks!!!!!!!!!!!!!

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