39
Dr.House
·2009-02-13 18:14:39
the process of conversion of carbonyl form into enol form is called wnoliation. and the ease of conversion of carbonyl into enol is called enolisability.
1
skygirl
·2009-02-13 18:21:18
is it always the case in general??
i think it depends ...
pls correct me if i am wrong...
39
Dr.House
·2009-02-13 18:29:07
as the acidic nature of α- hydrogen increases enolisability increases.
and in many aldehydes the enolisability is very less. this is because in most of the cases to the α- hydrogen an alkyl group is attached which is an electyron withdrawing group.
hence it decreases the acidity of the α-hydrogen thereby decreasing the enolisability.
therefore stability of enol form is veryy less.
24
eureka123
·2009-02-13 19:42:48
Sorry .....I cant understand .......[2]
Can u explain in simpler words first rather than conventional scientific language....plzzzz[2]
39
Dr.House
·2009-02-13 20:42:53
i am sorry dude, thats the best way i could have explained.
29
govind
·2010-02-22 00:53:45
@eureka..which is more stable C=C or C=O ?
24
eureka123
·2010-02-22 08:44:18
C=O bond has higher energy..
29
govind
·2010-02-22 08:47:51
so in chem everything wanna attain more stability ..since C=O is more stable than C=C in general cases..so keto form is more stable than enol...
Now this becomes a question for others why C=O is more stable than C=C ??
39
Pritish Chakraborty
·2010-02-22 10:06:03
@govind, something to do with orbital delocalisation and MO theory?
29
govind
·2010-02-22 20:55:03
@Pritish
Plz explain abt that orbital delocalistion.....
but the reason i know abt this phenomenon is somewhat different..
49
Subhomoy Bakshi
·2010-02-27 10:04:40
what is the thing that u know???
29
govind
·2010-03-03 03:54:00
For all those ppl who wanna the answer of the abv question can see the thread started by subhomoy..
http://www.targetiit.com/iit-jee-forum/posts/old-thread-was-unsolved-14822.html