| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Jun 2008 13:11:30 IST
|
|
|
out of p-nitrophenol and 3,5-dinitrophenol which one is more acidic????
|
I believe,It matters not whether you win or lose; what matters is whether I win or lose.!!!
|
|
|
|
27 Jun 2008 13:45:51 IST
|
|
|
the ans should be para nitro phenol coz .........there are 2 nitro groups in the second one but still due to the symmetry of para nitro phenol it will be more acidic
|
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 14:01:58 IST
|
|
|
no its 35 dinitro paddy dude u have applied the concept used for isomeric class they r non isomers where u just compare inductive effect and 35 has more -i
|
" I've shed many tears. But after, I realize, why am I crying? No matter how bad it got, it could be worse. No matter how much you think it's not going to be ok, eventually it will be. You just have to let it be."
EXPECT MORE FROM URSELF THAN FRM OTHERS AS EXPECTATION FRM OTHERS HURTS U WHILE FROM UR SELF INSPIRES U A lot |
this reply: 10 points
(with 2
in 2 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 14:02:28 IST
|
|
|
correct me if i am wrong
|
" I've shed many tears. But after, I realize, why am I crying? No matter how bad it got, it could be worse. No matter how much you think it's not going to be ok, eventually it will be. You just have to let it be."
EXPECT MORE FROM URSELF THAN FRM OTHERS AS EXPECTATION FRM OTHERS HURTS U WHILE FROM UR SELF INSPIRES U A lot |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 14:04:40 IST
|
|
|
ya ur rght but para has more symmetry that 3,5
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 14:06:36 IST
|
|
|
@pooja .....please tell
is the inductive effect of two no2 gps is greater than resonance as well as inductive effect of one no2 grp.......?
i think no.....so my ans will be:
paranitrophenol
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 14:38:13 IST
|
|
|
i will agree wid
vnkt.swaroop..........
|
what is this life so full of care ?
we have no time 2 stand & stare !!!!
--DAVIES--
laziness pays now.....
hard work L8ter....
but both pays ! !
If u can fill the unforgiving minute with sixty seconds worth of distance run;urs is da world n all dats in it----------->>>>a Russian who spend 7 yrs in siberia said dat the above lines helped sustain him
p.s. u wont loose ur rates if u will RATE me-------------->>>>>>
|
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 15:28:44 IST
|
|
|
it is p-nitro phenol because in 3,5dinitrophenol both are electron withdrawing groups whic are present at m-positions.So it is stabilized.but in p-nitro phenol nitro withdraws the electron density over hydroxy group.so the answer is p-nitro phenol is more acidic than 3,5dinitro phenol.If i am wrong correct me and if i am correct please vote me.
|
this reply: 6 points
(with 0
in 3 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 15:39:11 IST
|
|
|
i dun know wether i am correct but from some valuable sourcesi have gathered info !
http://www.kayelaby.npl.co.uk/chemistry/3_9/3_9_7.html
see here it is given
for 3,5 dinitro phenol pka1 is 6.69
and p nitro phenol is 7.15 i jst appled the concepts i have studied and frm the help of some frnds i have gained that
higher the pka lesser is the acidic strength now tell me puja singhtwinkle and smarsh where am i makin flaw
|
" I've shed many tears. But after, I realize, why am I crying? No matter how bad it got, it could be worse. No matter how much you think it's not going to be ok, eventually it will be. You just have to let it be."
EXPECT MORE FROM URSELF THAN FRM OTHERS AS EXPECTATION FRM OTHERS HURTS U WHILE FROM UR SELF INSPIRES U A lot |
this reply: 10 points
(with 2
in 2 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 15:47:27 IST
|
|
|
in p-nitro phenol the delocalization of electrons takes place which is not possible in 3,5dinitro phenol.Also due to the removal of electron charge over -OH a partial double bond forms between O&C.Hence it is easier to remove H in case of p-nitro phenol.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 15:47:43 IST
|
|
|
i think , there might be ortho effect taking place in 3,5 compound...........and we all know that ortho effect increases acidity
hp this is right and correct me if vice versa.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 16:22:36 IST
|
|
|
see it is very tough to say by theortical concepts which is more acidic....bcoz we cant say will 2 strong inductive can overcome the 1 mesomeric effect or not......
but as said by pooja for 3,5 dinitro phenol pka1 is 6.69
and p nitro phenol is 7.15
so 3,5 dintrophenol is more acidic......
remember first practicals are done and then theories are given
|
SAHIL MADAAN
MECHANICAL ENGINEERING (B.Tech. 4 Yr)
IIT PATNA |
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 21:30:43 IST
|
|
|
but the resonance and hybridization were not perfectly observed by any one.So how can you say that all theories are based on practicals.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jun 2008 23:36:28 IST
|
|
|
ppl i waana no that does stability of the compound has to do any thin with the acidic nature of tho compounds bcuz p-nitro phenol is both resonance stabilised and it also has alt. double and single bond...or is it the stability of the radical formed which matters..
plz tell me..and correct if wrong...
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
28 Jun 2008 00:09:25 IST
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
