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 my god........... didnt get ur assignment done ...... here we r to help uuuuuuuuu

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Lathika
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PostSubject: my god........... didnt get ur assignment done ...... here we r to help uuuuuuuuu   Tue Feb 17, 2009 11:37 am


SN1 MECHANISM FOR REACTION OF ALCOHOLS WITH HBr

Step 1:
An acid/base reaction. Protonation of the alcoholic oxygen to make a
better leaving group. This step is very fast and reversible. The
lone pairs on the oxygen make it a Lewis base.



Step 2:
Cleavage of the C-O bond allows the loss of the good leaving group,
a neutral water molecule, to give a carbocation intermediate. This is
the rate determining step (bond breaking is endothermic)




Step 3:
Attack of the nucleophilic bromide ion on the electrophilic carbocation
creates the alkyl bromide.





Good Day



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Reshmi Raj
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PostSubject: thank u   Wed Feb 18, 2009 5:49 pm

THANK U,Lathuuu..........i'm really searching for this. Wink
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