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![[Post New]](/templates/default/images/icon_minipost_new.gif) 28 Jan 2008 17:51:36 IST
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ph-----ph------ph ---------->(reagnt Br2 Fe,) wats d product.............................its actually 3 benzene ring joined in this fashion...............i m confused abt o p positions ,where Br ll b attachd,............pl help wid a proper representation................... sorry i kod nt draw it properly......
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28 Jan 2008 19:25:30 IST
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bromine will be attached to the middle ring
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"I a universe of atoms.......an atom in the universe" |
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28 Jan 2008 21:29:18 IST
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i think it should attach to the middle ring.......
and there is no p position in it!!
so it will attach to ortho...and all m/o are similar...
i mean that o wrt 1 ring is m wrt the other...
so u can attach it anywhere!
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29 Jan 2008 09:51:40 IST
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y in d middle ring ???????????????pl xplain y nt in side rings???//pl pl xplain......................
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29 Jan 2008 10:57:12 IST
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Arre,the middle benzene ring is activated most for E.A.S. as there are 2 ph groups attached to it .
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29 Jan 2008 11:03:43 IST
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bromine will attach to the middle phenyl
REASON : the cental phenyl being the most vulnerable due to negative inductive effect ( electron withdrawing effect) exerted by the peripherals...........
and bromine being an electrophile will attack the weakest phenyl........
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
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29 Jan 2008 12:06:17 IST
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hey...
the side rings exert a kind of electron withdrawing effect on the middle ring and thus create +ve charge density at ALL positions....
but in the side rings the +ve charge resides only at the ortho and para positions.....
so it should attach to meta position of SIDE RING!!!!(and NOT the middle ring)
am i wrong somewhere??
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29 Jan 2008 23:07:15 IST
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in my opinion d reaction is not possible
as all have pointed out that if at all d reaction exist d attack should b in the middle ring
BUT now ph group is o,p directing and o position wid respect to one ph is m position wid respect 2 other
ANother reason is also the sterical hinderence in the middle ring
plz correct me if i am wrong
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31 Jan 2008 13:21:45 IST
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well d ans was in d middle ring.........................wher r all forum xprts gone????????????????do help pl...........
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