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Topic: Which has greater -I effect -N(CH3)3 or -NH3  (Read 4423 times)

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Offline sidharth

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Which has greater -I effect -N(CH3)3 or -NH3
« on: February 11, 2010, 11:00:29 PM »
Which has greater -I effect  -N(CH3)3 or -NH3 ?

If you think about the +I effect of ch3 then the answer would be -N(CH3)3 has  less  -I effect than   -NH3 .
How would explain this phenomenon?

thanks!

Offline lutesium

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Re: Which has greater -I effect -N(CH3)3 or -NH3
« Reply #1 on: February 12, 2010, 08:20:37 AM »
Which has greater -I effect  -N(CH3)3 or -NH3 ?

If you think about the +I effect of ch3 then the answer would be -N(CH3)3 has  less  -I effect than   -NH3 .

If you mean ED (Electron Donating) by +I and EW (Electron Withdrawing) by -I your answer is true!!!
If you want an explanation for this fact here he is:
Hydrogen is less ED or +I  than the Methyl Group. Therefore replacing he three Hydrogens with a Methyl Group (Forming triMethyl Amine) enchances the Basicity of the Nitrogen Atom becoming more ED thus more +I who also means less -I effect!!!


Lutesium

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