Disucss Test Questions - Test:351 QNo:23

11

Mani Pal Singh ·2009-04-24 01:51:50

HELP

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Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-24 01:53:22

3>2>1

this is wat i wrte

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1357

Manish Shankar ·2009-04-24 02:51:34

use inductive effect concept

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11

Mani Pal Singh ·2009-04-24 02:53:15

sir isn't it

3>1>2

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Subash ·2009-04-24 04:25:41

isnt it 3>1>2

as methyl is +I

methoxy -I

nitro strong -I?

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1357

Manish Shankar ·2009-04-24 04:45:51

yup subash and manipal you are correct

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Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-24 05:20:24

in methoxy oxygen wud give itz lone pair na ...........so it acts like an activating gruop ??

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kamalendu ghosh ·2009-04-24 05:50:47

OCH3 has +R and -I so i think it will be 3>2>1

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spiderman ·2009-04-24 06:03:00

p-nitrophenol >p-methylphenol> p-methoxyphenol
yeh nahi banta kya? [2]

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skygirl ·2009-04-24 16:34:57

i am pretty sure its 3>2>1

** if a same compound shows both inductive effect and resonance effect, we first see the later, then the former...

but chem is full of exceptions! so let me know if this is one.

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1357

Manish Shankar ·2009-04-24 21:25:48

I found this on net
please confirm if they are correct
you can see how close the pka values of methoxyphenol and methylphenol

Phenol 10.0
p-Methoxyphenol 10.2
p-Methylphenol 10.3
p-Nitrophenol 7.2

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Test:351 QNo:23

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