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Miggi Groupbie
Miggi
Miggi

Joined: 02 June 2006
Posts: 142

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. Cry

akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5248

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
akhl
akhl

Joined: 30 March 2007
Posts: 5248

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
akhl
akhl

Joined: 30 March 2007
Posts: 5248

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 Groupbie
Miggi
Miggi

Joined: 02 June 2006
Posts: 142

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
akhl
akhl

Joined: 30 March 2007
Posts: 5248

Posted: 10 March 2011 at 8:46pm | IP Logged
Can u post here what answer u entered for #4 ?
akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5248

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.
 
 
 
shree93 IF-Dazzler
shree93
shree93

Joined: 07 October 2006
Posts: 3258

Posted: 16 March 2011 at 1:45pm | IP Logged
A voltage of 16.0 V is applied across the two ends of a Tungsten wire with a temperature coefficient of resistivity of 4.5010-3 1/K. Initially the wire is kept at room temperature. If the wire is cooled down to freezing temperature, then the power dissipated by the wire will: 
 decrease 
 stay the same 
 increase 

i think it will increase, but I am not 100% sure.

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