1yup good enough fr a 90 percentile....!!
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24 Answers
19yes,,,fluorine is a bad leaving group in this case because of partial double bond character ! so we are trying to use electron withdrawing groups in the ring and activate a position for nucleophilic substitution !
1@organic
for the answer for Q3
isn't flourine a terribly bad leaving group??
or am I I wrong in thinking that the reaction taking place is Williamson's ether synthesis??
23guyz can any 1 upload any test paper ???? it can be of any year ..but pls post it ..
19here we are trying a nucleophilic substitution on an aromatic ring at the C-X bond which is very strong due to partial double bond character ! so, we can make our purpose successful by 2 ways:
(1) use strong electron withdrawing groups on the ring so that the substitution can be easily accomplished
(2) use high temperatures(as in dow's process)
the second factor was not there in any answer ! so we chose the first factor !
1hey anyone did that ether synthesis question (q3 paper 1)......i think the answer given is wrong!!!
1it was tougher than 1st one especially paper 2. I didn't studied AC nd dere were lots of question from dat........
1maths was a disaster for me ..........i practiced so much coordinate but wo bhi thik nahin hui[2]
21it seems tat this year pt2 was easier than previous year.....by seeing marks of all u guys
1still very sad abt physics....never thought i would get this low....
:(
1i got 55 in first paper in physics
but screwed up second paper getting only 25
total -180
21oh rilly arshad gr8.....last year with 183 marks in pt2 u would hav fetch 98 percentile
19but what about the total marks, arshad ??(forget about old quarrels,,,lets cheer up !!)
1physics was the toughest this time around....
too difficult...
getting only 28 in it.....