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akhl

IF-Rockerz

Joined: 30 March 2007

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Posted: 07 March 2011 at 4:40pm | IP Logged

So you removed Br and put OH in its place? If so, then the answer should be correct.

But if it does not work, then try replacing Br by H2O+ (May be website expects it as OH2 + or some other way.)

This is because Br is replaced by H2O+ in the first stage and may be you have to answer only for the first stage.

Seeing other questions.

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Miggi

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Joined: 02 June 2006

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Posted: 08 March 2011 at 2:21pm | IP Logged

Originally posted by akhl

So you removed Br and put OH in its place? If so, then the answer should be correct.

But if it does not work, then try replacing Br by H2O+ (May be website expects it as OH2 + or some other way.)

This is because Br is replaced by H2O+ in the first stage and may be you have to answer only for the first stage.

Seeing other questions.

It still is wrong. It just says the reaction is SN1 and product is neutral.

akhl

IF-Rockerz

Joined: 30 March 2007

Posts: 5042

Posted: 08 March 2011 at 2:26pm | IP Logged

Yes the reaction will be SN1 because of steric hindrance. But the result should be the alcohol i.e. replace Br by OH.

I am really not sure why this is saying wrong?

Both SN1 and SN2 will give the same final product. The difference is in the mechanism. But question is not asking about mechanism.

akhl

IF-Rockerz

Joined: 30 March 2007

Posts: 5042

Posted: 08 March 2011 at 3:33pm | IP Logged

See this image. Is this the answer you entered?

Note that there will be both substituion and elimination reactions. But I have given result for only substitution because question mentions substitution.

Edited by akhl - 08 March 2011 at 3:34pm

akhl

IF-Rockerz

Joined: 30 March 2007

Posts: 5042

Posted: 10 March 2011 at 5:41am | IP Logged

There will be both SN1 and E2 reactions.

SN1 reaction will produce what I wrote in previous post.

E2 reaction will produce 2-methyl-2-butene as shown below.

In fact, this 2-methyl-2-butene wll be the major product.

Edited by akhl - 10 March 2011 at 5:42am

Miggi

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Posted: 10 March 2011 at 3:04pm | IP Logged

Hey! Thanks for your help. 1st one was right. the website required to put a C at the middle and that was causing a problem. Can you please try to solve other q's too as they are due by tomorrow?

akhl

IF-Rockerz

Joined: 30 March 2007

Posts: 5042

Posted: 10 March 2011 at 8:46pm | IP Logged

Can u post here what answer u entered for #4 ?

akhl

IF-Rockerz

Joined: 30 March 2007

Posts: 5042

Posted: 10 March 2011 at 9:32pm | IP Logged

I am sure either 1 or 2 in the diagram below is correct for #3.

Try the structure on the left first.

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HOMEWORK helpline - Open 24 hours (Page 42)

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Posted: 07 March 2011 at 4:40pm | IP Logged

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Posted: 08 March 2011 at 3:33pm | IP Logged

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