CARBOCATION STABILITY

2>4 >3>1

this is da rite ans........

ofcrs in 3, there is hyperconjugation which is absent in 1.

i think 2,4 ,1,3

REASONS FOR ORDER OF 1 AND 3!!!!!!!!!!!!!!!!

@ANIRUDH AND METAL

AS FAR AS I THINK IT WUD BE 3>1 COZ OF HYPERCONJUGATION IN 3
......DO U AGREE?????????

anirudh

reply kar bhai?

bhai bhai, i don't know any complex terms like hyperconjugation and all....but i think 1>3 because, even though the catbocation itself is not tertiary, it can become more stable by means of a methyl shift.

It is probable-------- I had thought of inductive effects only,
I'll have to rethink--------
[ Isiliye mujhe Organic Chemistry pasand nahin-------- kuchh bhi ho sakta hai :-( ]

Anirudh, by methyl shift, 1 will change to a 2ndary carbocation.
Similarly, 3 can also change to a 2ndary carbocation by hydride shift.

are yaar...y r u thinking of methyl shift etc.

i simply mean to say

1.that in 3 we will have hyperconjugation as C-H bond is adjacent to positively charged carbon.this will disperse positive charge on carbocation and 3 attains stability.

2.whereas in 1no such hyperconjugation is possible as there is no C-H bond adjacent to positively charged.

so due to above two reasons i think 3>1

hope after reading above two reasons u agree with me!

1>3 acc to inductive eff..
therefore 2>4>1>3

yes... u can see our empress has answered.... no more word to say!!

PLZ REPLY

so which will win over the other?

HYPERCONJUGATION vs INDUCTIVE EFFECT

VENUE: http://targetiit.com/iit_jee_forum/posts/carbocation_stability_8716.html

MATCH ORGANISER: JOHN CENA

MATCH REFREE: ANI

WINNER??

see i think 3>1

REASON:inductive effect vanishes after three bonds.........

now even if you look at 3 and 1 from inductive effect point of view,the inductive effect in both should be nearly equal(coz although one has three methyl groups for inductive effect but they r at a distance of two bonds).so,inductive effect in 1 and 3 is nearly same.

now,in addition to inductive effect there is hyperconjugation in 3.

so clearly 3>1.

hey skygirl plz check ma explanation????????

@sriraghav

check #20.

bhai log
paglao mat

yahi toh organic chem ka kharabi hai ... ki u have to use the correct concept at correct place ... which even my sirs are not able to do .. so chill out .. don't waste ur time in this question !

@metal
read #20