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![[Post New]](/templates/default/images/icon_minipost_new.gif) 9 Jul 2008 16:35:43 IST
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TELL ME, IF VINYL GP IS ATTACHED TO BENZENE RING,WHR WILL THE  ELECTRONS FLOW.................TOWARDS BENZENE RING i.e TO C ATOM ADJ TO BENZENE RING (SINCE IT IS ELECTRON WITHDRAWING GP) OR TO THE OTHER C ATOM.(DUE TO MARKONIKOFF'S RULE)
I THOUGHT THE 1ST 2 B RIGHT ,BUT ARIHANT SAYS THE OTHER. PLEEEEEEEEEEZ REPLY SOON
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9 Jul 2008 16:47:07 IST
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vinyl group attached to benzene ring???
PLZ clarify which case R U talking abt?
1 or 2?
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9 Jul 2008 16:49:33 IST
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I M TALKING ABT 2 CASE,. ALSO TELL ME HOW TO DRAW STRUCTR
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9 Jul 2008 16:51:53 IST
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tarin 1 is wrong since C is getting 5 bonds
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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9 Jul 2008 16:53:20 IST
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Ooops.
LOL...
Thanks spidey for correcting me. :)
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
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9 Jul 2008 16:54:32 IST
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ARE SOM1 ANS MY Q.ITS URGENT!!!!!!!!!!!!! I M TOTALLY FLUSTERED
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9 Jul 2008 17:01:00 IST
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I donno what do u mean by shifting of pi-bond.
Markonikov's rule is used in addition reactions and I have shown an example of addition reaction with H-Br in the figure.
And the intermediate should be the one shown in the figure.
And I neither trust nor follow arihant, so it may be possible that my answer differs from that of arihant's.
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
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9 Jul 2008 17:01:12 IST
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Since the left side Carbon is somewhat more stabilized due to the aromatic attachment, the pi electrons are a bit closer to the further C.
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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9 Jul 2008 17:02:31 IST
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will shift towards the other carbon....coz benzly carbocation is acuired by doing so and it is very stable....
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"Logic is the systematic way of reaching the wrong conclusion with confidence" lol..... |
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9 Jul 2008 17:07:37 IST
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If U follow the Markonikov's rule that - the acid proton bonds to that carbon atom of alkene that already holds more no. of H atoms.
Then plz stop following this rule.
Markonikov's rule(extended)-In an electrophilic addition to an alkene, the electrophile adds in such a way as to generate the most stable intermediate.
This is the correct and extended Markonikov's rule. Use this and U wud always get ur answers right.
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9 Jul 2008 17:08:08 IST
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WAT I WAS THINKING
SEE, BENZENE RING IS ELECRON WITHDRAWING.THEH THE PI ELECTRS SHUD FLOW TO LEFT C ATOM
WHY THEY R SHIFTING TO THE OTHER C ATOM , NOW IF TO RIGHT SIDE C ATM 2 CH3 -ELEC RELEASING GPS R ATTACHED STILL THE MOVEMENT OF ELECTRN WILL B SAME
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9 Jul 2008 17:12:14 IST
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Arre I have shown U the mechanism.
The pi bonds dont move anywhere. They polarize the H-Br bond to a large extent and extract H+ from H-Br which adds to the double bond in such a way as to generate the most stable intermediate(Markonikov's extended rule).
Still any doubt?
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
It is during our darkest moments that we must focus to see the light.
Check out my blog at:
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Posts:
Can marks really judge a student??
Some myths about Chemical Engineering.
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Back to goiit, this time with Baby Veerappan. :D |
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9 Jul 2008 17:20:26 IST
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I THOUGHT FIRST THE PI ELECTRN SHIFT ,FORMS ANION , H+ ATTACKS ,THEN REARRANGEMENT OF CATION TAKES PLACE TO ACQUIRE MAX STABLITY.WAS I WRONG?????????/
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9 Jul 2008 17:22:17 IST
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ACTUALLY THEY HAV MNTIONED BENZYLIC RAD IS MORE STABLE
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Moderation Team
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