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![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Apr 2008 22:11:17 IST
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http://www.hashminds.com/public/question.do?mode=salone&questionid=221
a good question plz ans
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FAILURE IS NOT FALLING IN LIFE BUT NOT RISING AGAIN AFTER FALLING!!!!!!
I LIKE WAVES NOT BECAUSE THEY RISE AND FALL..
BUT BECAUSE EVERYTIME THEY FALL THEY RISE AGAIN!!!!!!!
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23 Apr 2008 22:22:07 IST
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the answer is C and not D [edited]
see in the first step, CHCl3 add up to ring as CHCl2-
in second step, one of the -Cl is replaces by -CN
final step, -CN gives acid, and -Cl being a better leaving group gets out and gives place for -OH
the reason is that -OH is a better activating grp as compared to -CH3
so subsn shud take place in acc with -OH group and hence subn will take place at o- group to -OH
the coloured part is edited one
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23 Apr 2008 22:35:54 IST
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er are u sure its correct??? i think the ans shud be C
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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23 Apr 2008 22:42:51 IST
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ya thats wat i was thinkin the orintation shud be decided by OH grp....
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FAILURE IS NOT FALLING IN LIFE BUT NOT RISING AGAIN AFTER FALLING!!!!!!
I LIKE WAVES NOT BECAUSE THEY RISE AND FALL..
BUT BECAUSE EVERYTIME THEY FALL THEY RISE AGAIN!!!!!!!
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23 Apr 2008 22:44:15 IST
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yup.same here CHO shud go to ortho wrt OH
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Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
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23 Apr 2008 23:13:39 IST
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Hmm, the answer shud be C.
See, to place an electrophile U need to see a position with MAX electron density.
Now both OH and CH3 hav +R effect but OH shows Mesomeric effect and CH3 shows hyperconjugation.
Now the priority order of the effects is- MESOMERIC > HYPERCONJUGATION > INDUCTIVE
So electron density near OH will be more than that near CH3.
So the CHO will be placed near OH NOT CH3.
EDITED
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