Homework Help: organic chemistry

Posted by needhelpwithchem on Monday, April 20, 2009 at 3:09am.

What alkyl halide or product will I get if I mix 2,4-dimethyl-3-pentanol with NaBr and sulfuric acid, and what substitution mechanism, SN1 or SN2 will that reaction undergo? Thanks in advance.

What if I mix 1-propanol with NaBr and sulfuric acid, what mechanism would that be?

What if I mix 2-pentanol with NaBr and sulfuric acid, what mechanism would that be?

organic chemistry - Dr Russ, Monday, April 20, 2009 at 4:43am
You need to look at the stability of the + ion formed. There is a good description on the wikipedia pages:

http://en.wikipedia.org/wiki/SN2_reaction

http://en.wikipedia.org/wiki/SN1_reaction
organic chemistry - need help with chem, Monday, April 20, 2009 at 1:50pm
for 1-propanol with NaBr and sulfuric acid, can I assume the mechanism is SN2 because the alcohol is on a primary carbon? I"m confused because when I write out the reaction, there will be a primary carbocation, and I'll have to do a shift right? I thought the product would be bromopropane but with the shift it will be 2-bromopropane?

for 2-pentanol, since the alcohol is on a secondary carbon, it can be either SN1 or SN2. I'm still confused

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