| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Jul 2008 11:26:52 IST
|
|
|
which is more acidic among o-hydroxybbenzoic acid and m-hydrxybenzoic acid and why ?
|
|
|
|
26 Jul 2008 11:58:51 IST
|
|
|
i think it wil be ortho
|
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jul 2008 12:02:08 IST
|
|
|
i would say meta is more acidic because there will be H-bonding in the case of ortho,which will reduce its acidity.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jul 2008 17:11:42 IST
|
|
|
I think tis ortho!~
Coz the value of Ka for Ortho is maximum,i.e, 107 x 10-5 nd as d value of Ka increases the acidic strength also increases!~
|
MY HOGWARTS ACC. http://harrypotter.ca/View_Profile_Member.php?User_Name=Yash%20Vardhan%20Sinha
I KHEN BCOZ I THINK I KHEN !!!!
IF TIS GOIN2 B, TIS UP2 ME !!!!
DER IS 1 CORNER IN D WORLD 2 B CORRECTED BY ME DATS MYSELF !!!!!!
IF I KHEN CORRECT MYSELF THEN I KHEN BLIV TAT DERS 1 IDIOT LESS IN DIS WORLD !!!!
|
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jul 2008 17:32:56 IST
|
|
|
its ortho & its because of ortho effect which is mostly due to intra-molecular hydrogen bonding
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jul 2008 23:18:35 IST
|
|
|
at the ortho position there is greater extent of hydrogen bonding which results in increased stability.hence acidity is greater
|
there are numerous options besides I.I.T
<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
   
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
|
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
26 Jul 2008 23:25:34 IST
|
|
|
i too think ortho is d ans.........
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jul 2008 12:35:37 IST
|
|
|
due to bulkiness of cooh group it leaves the plane of benzene and acts as a -I group insted of +r group due to this the acidity of the ortho substituted benzene is more than any other substituted benzene.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jul 2008 14:14:15 IST
|
|
|
due to both intramolecular hydrogen bonding and ortho effect 0-hydroxy benzoic acid is more acidic
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jul 2008 14:19:10 IST
|
|
|
sorry ,the actual reason is that hydrogen bonding decreases the acidic character and orthoeffect increases acidic character but orho effect dominates over hydrogen bonding ,hence o-hydroxybenzoic acid is more acidic than m-
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jul 2008 14:42:54 IST
|
|
|
the more the stability of the original compound less is the reactivity and in this case to lose H+ ion. In ortho one there is intramolecular H-bonding so it is stable and less reactive. hence, meta one is more acidic.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
27 Jul 2008 16:27:42 IST
|
|
|
Well the answer is ortho is more acidic.We decide acidity of an organic compound mainly by its stability of the conjugate base. Here the conjugate base contains O- which is stabilised due to internal hydrogen bonding where the negative charge of O" of carboxylic group is stabilised by its partial sharing with hydrogen of hydroxyl group. if u liked answer pls rate
|
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
1
