MY CART (5)

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping

X

“Hurray! You have won the gift voucher. Redeem your points now."

X

                   how to determine the stability of carbocation and what is the concept of bridge carbon
                   

5 years ago

Share

Answers : (1)

                                        

Dear student,


We know that methyl group is electron releasing i.e. has +I inductive effect. The alkyl group attached to positively charged carbon atom tends to release electrons towards carbon. This decreases the positive charge on the carbon atom but the carbon itself is somewhat positive. As a result, the positive charge on the carbon atom gets dispersed, giving it stability. Therefore, more the number of alkyl groups, the greater will be the dispersal of charge and therefore, more stable will be the carbocation.


Thus, tertiary carbocation in which there are three alkyl groups attached to positive carbon is more stable than a secondary carbocation with two alkyl groups. Similarly, a secondary carbocation is more stable than a primary carbocation, which in turn is more stable than methyl carbocation:


stability of carbocations

Thus, the order of stability is: CH3+ < 1o < 2o < 3o


Other carbocations are benzyl carbocation, which is primary in nature but is highly stable because of resonance stabilization.


 


resonance stabilization of carbocations

Triphenyl carbocation, Ph3C+ is the most stable because of resonance stabilization among three phenyl groups.











Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.


All the best.


Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.


Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..


 


Askiitians Expert


Sagar Singh


B.Tech, IIT Delhi










4 years ago

Post Your Answer

More Questions On Organic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
Select the correct statements regarding E2 reactions it is anti-periplanar rearrangements take place it is a single step reaction
 
 
Yes u r right, actually it was my fault, I mean first and last and so I should have to write 1 and 3. Thanks for your comment. ......................................................
  img
Naveen Kumar 8 months ago
 
1 and 2. For details please read the text book. ......................... ....................................................... ..........................................................
  img
Naveen Kumar 8 months ago
 
The correct statements are it is anti- periplanar it is single step reaction
 
Himaja 8 months ago
What are the products formed when 2-methoxy propane reacts with conc HI
 
 
The carbon-oxygen bond is ethers can be cleaved by heating with HI or HBr to form an alcohol and an alkyl halide at 373K.In case of unsymmetrical ethers which contains two different alyl...
  img
Aarti Gupta 7 months ago
 
The carbon-oxygen bond is ethers can be cleaved by heating with HI or HBr to form an alcohol and an alkyl halide at 373K.In case of unsymmetrical ethers which contains two different alyl...
  img
Aarti Gupta 7 months ago
 
In the presence of conc.HI I think (CH3)2CH-OH changes to (CH3)2CH-I. Also since a secondary carbon is present SN 1 mechanism may occur then the products are different(CH3OH and...
 
Himaja 7 months ago
please i need a detailed explanatino of ionic reactions from the very beging i do need a detailed explanation of redox reactions with examples
 
 
what exactly is your doubt? give a sample question and ill explain it (:
 
Neeti yesterday
what is the most aboundant element element on earth
 
 
The most abundant element on the earth is oxygen.Although most of the earth’s crust is composed of 8 elements,but oxygen tops the list in terms of abundance.It constitutes about 46% of...
  img
Aarti Gupta 20 days ago
 
yes aarti ma'am is absolutely correct
 
vindhya 17 days ago
 
oxygen is the most abundant
 
Prajwal Kavad 13 days ago
what is the shape of NH 3
 
 
pyramidal
  img
Avinash 28 days ago
 
  img
Saurabh Kumar 28 days ago
 
pyramidal..because , no.of valence electrons in Nitrogen-5 bond pairs-3 lone pair-1
 
VIDULA 28 days ago
which book to follow for the chapter QUALITATIVE ANALYSIS ?
 
 
Go with R S Aggarwal....
  img
Saurabh Kumar 19 days ago
View all Questions »