| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Jun 2008 14:40:57 IST
|
|
|
Which comp is aromatic?
Pyridine
Pyrrole
Explain also.
|
|
|
|
26 Jun 2008 16:08:51 IST
|
|
|
PYROLE IS AROMATIC AS IT HAS 2E-S N: ND PALANAR SHAPE ALSO.............
APPLY HUCKELS RULE OF AROMATICITY..........
|
[
[url=http://sig.graphicsfactory.com/]
    
[/url]
Glitter Graphics
|
this reply: 2 points
(with 0 
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 16:17:16 IST
|
|
|
both are aromatic.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 18:14:45 IST
|
|
|
Both are aromatic.
NOTE : In Pyridine, the lone pair on Nitrogen is not involved in delocalization.
|
"Nenenthedhavano naake teleedu"
|
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 21:41:40 IST
|
|
|
In Pyridine, the lone pair on Nitrogen is not involved in delocalization.
Pyridine
Do we have to count those Pi electrons which are involved in delocalisation or what?
The answer doesn't show both as aromatic.
|
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 22:33:47 IST
|
|
|
both are heterocyclic aromatic compounds. aromaticity is a property of compounds which have 4n+2 pi electrons and are planar in nature due to which they are exceptionally stable. the lone pair in pyridine is not in a conjugated system and we don't consider that. hence we consider 6 pi electrons....
|
Agar aap 90 baar paap karoge to keval 45 baar hi pakde jaoge......batao
kyu????* *
b'cos.... sin90=cot 45 |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 22:46:15 IST
|
|
|
Both are aromatic because both have 4n + 2 pie electrons.. In case of Pyrrole, 2 lone pairs and 2 double bonds contribute 6 pie electron and in Pyridine, 3 double bonds contibute 6pie electrons.. it all depends on whether the lone pairs are required and are suitably oriented to involve themselves in delocalization..
|
Happines is like a butterfly;
the more you chase it,
the more it will elude you,
but if you turn you attention to other things,
it will come and sit softly on your shoulders... |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jun 2008 22:52:08 IST
|
|
|
from what i can decipher, the lone pair on pyridine are perpendicular to the lobes and hence don not contribute to the aromaticity/anti-aromaticity. hence, they are nor considered and pyridine is aromatic in nature...but i'm pretty sure that both are aromatics....
|
Agar aap 90 baar paap karoge to keval 45 baar hi pakde jaoge......batao
kyu????* *
b'cos.... sin90=cot 45 |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
