| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 15 Mar 2008 00:23:34 IST
|
|
|
Q4) Which of these is/are aromatic: Pyrrole, Protonated Pyrrole. Give reasons to support our answer ?
|
|
|
|
15 Mar 2008 00:33:41 IST
|
|
|
pyrrole is aromatic because the lp on N is involved in resonance with the ring making it a 6 en system (4n+2) Huckel rule protonated pyrrole isnt aromatic bcos there is no lp on N hence its a 4 en systen n is hence antiaromatic
|
this reply: 2 points
(with 0 
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 00:50:31 IST
|
|
|
thats right
pyrole is aromatic
and its pronated species is not
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
  
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 00:51:06 IST
|
|
|
4n+2 huckel rule as rohit says moreover the abs of lone pair in protonated species
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 00:53:17 IST
|
|
|
my name is sandeep ramesh Huh? Who are you? A known friend?
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 00:54:59 IST
|
|
|
orp
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 00:56:27 IST
|
|
|
are you sure?
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 01:04:47 IST
|
|
|
check ur nudgebook
|
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 01:48:26 IST
|
|
|
rightly said....pyrrole is aromatic as N -lone pair of electrons are present in unhybridised orbital.so contribute towards aromaticity.n= 1
while protonated is not...
|
padhna likhna chad de mitra , nakal te rakhi aas , chak chaddar te so ja bhagta , Rabb karega tennu paas.....
PLZ NEVER EVER RATE ME FOR MY ANSWERS , IF U WANT TO COMPLIMENT ME THEN JUST BEAT UR HEAD & SAY
"YEH KIS PAGAL NE MERA QN. SOLVE KER DIYA"
I AM SERIOUS!!!!
EVEN SERIOUS ^ INFINITY
PLZZZZZZ NEVER RATE ME....HOPE U WILL UNDERSTAND....
Shubham
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 Mar 2008 03:34:55 IST
Accepted Answer [?]
![[Up]](/templates/default/images/icon_up.gif)
|
|
|
Pyrrole is aromatic.
The pyrrole N atom is sp2 hybridised and its unhybridised p-orbital overlaps with the p-orbitals of the C atoms to form a continuous ring.
Whereas in protonated pyrrole, this N lone pair is now involved in bonding with H and not available for overlapping.
|
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.
''Darr sabko lagta hai, Gala sabka sookhta hai
Par, darr ke aage hi jeet hai''
To mountain dew piyo and IIT mai jaao. :P
For those giving JEE in 2008-
http://www.goiit.com/posts/list/about-iits-how-many-of-u-are-giving-hav-given-jee-08-52658.htm |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
17 Mar 2008 13:50:54 IST
|
|
|
good!!
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
17 Mar 2008 13:55:27 IST
|
|
|
But pyrolle doesn't get protonated easily for info. But still hypothetically that's right protonated version is non-arromatic.
|
    
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
17 Mar 2008 14:10:35 IST
|
|
|
|
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
17 Mar 2008 14:15:30 IST
|
|
|
isnt protonated pyrrole anti-aromatic??
cuz layman says non-aromatic..
it makes a diff if im not wrong..
|
by the left!!!
forward march!!!
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
17 Mar 2008 14:19:14 IST
|
|
|
No it is also not antiarromatic because for anti arromatic shifts to take place(HOMO-LUMO and LUMO-HOMO) it should pass thro the Nitrogen which is not possible. So its just conjugated.
|
|
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
Moderation Team
