Disucss Test Questions - Test:351 QNo:23

11

Mani Pal Singh ·Apr 24 '09 at 1:51

HELP

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Â°áƒ¦â€¢à¹“ÑÏ…Î ·Apr 24 '09 at 1:53

3>2>1

this is wat i wrte

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1357

Manish Shankar ·Apr 24 '09 at 2:51

use inductive effect concept

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Mani Pal Singh ·Apr 24 '09 at 2:53

sir isn't it

3>1>2

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Subash ·Apr 24 '09 at 4:25

isnt it 3>1>2

as methyl is +I

methoxy -I

nitro strong -I?

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Manish Shankar ·Apr 24 '09 at 4:45

yup subash and manipal you are correct

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Â°áƒ¦â€¢à¹“ÑÏ…Î ·Apr 24 '09 at 5:20

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

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kamalendu ghosh ·Apr 24 '09 at 5:50

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

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spiderman ·Apr 24 '09 at 6:03

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

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skygirl ·Apr 24 '09 at 16:34

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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Manish Shankar ·Apr 24 '09 at 21:25

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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