what is the stability of aryl carbocations?

3 years ago

Share

Answers : (1)

                    

Dear rishi,


If the carbon having positive charge is part of a benzene ring, the carbocation is an aryl carbocation.

aryl carbocations do not have resonance stabilisation because their p electron clouds are perpendicular to the vacant p orbital of the carbocation.


Electronegativity is a tendency of electron attraction.  So the stability of a cation is influenced by the electronegativity of the atom bearing the positive charge.  The more electronegative the atom,  less stable the cation.  A vinylic carbocation carrying the positive charge on an sp carbon is more electronegative than an sp2 carbon of an alkyl carbocation.  Therefore, a primary vinylic carbocation is less stable than a primary alkyl carbocation. Similar reasoning explains why an aryl carbocation is less stable than a typical secondary alkyl carbocation. Because of their reduced stability, vinyl and aryl carbocations are not discussed often.



We are all IITians and here to help you in your IIT JEE preparation.

All the best.


 If you like this answer please approve it....


win exciting gifts by answering the questions on Discussion Forum


 





Sagar Singh


B.Tech IIT Delhi


3 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
incorrect name of an alkyne is : a. propyne b. but-2-yne pent-3-yne d. but-1-yne
 
 
Incorrect name of alkyne among the above is :– pent-3-yne.As per rule of IUPAC nomenclature the functional group must get lower number.It should be pent-2-yne,because when you count...
  img
Aarti Gupta 7 days ago
what is mean by a indicator in titration?
 
 
Titration is the process of determining the volumes of reagents(or solutions),required for the just completion of a reaction.The point at which the reaction is just completed is called the...
  img
Aarti Gupta 3 months ago
 
While performing a titration, we slowly add one solution of a known concentration to another known volume but without knowing concentration. This process of adding titrant to another...
  img
Vasantha Kumari 3 months ago
 
Indicator is a substance that changes the color of a solution in order to detect the presence of certain ions in it. It can also be used to indicate the presence of completion of a reaction...
  img
Ruchi Shaw 3 months ago
What is aromaticity?
 
 
it is unexpected stability of compound or Aromaticity is the property associated with the extra stability of certain types of p systems. Fundamentally it arises from having the maximum...
 
Indu 4 months ago
 
Aromaticity is a chemical property describing the way in which a conjugated ring of unsaturated bonds, lone pairs or empty orbitals exhibits a stabilization stronger than would be expected...
 
BIRADHER SHREYA 4 months ago
 
a planar cyclic compound having complete resonance and 4n+2 pi electrons is aromatic. this phenomenon is aromaticity
 
akshansh gupta 4 months ago
In Back Titration. In second Titration (When we mix impure substance with A) , do we take the same amount of volume of A as we take in the first titration?
 
 
in second titration if A is titrated with B then B should be standarised then it should be titrated with A .B should be standarised with C. EX-we have to calculate molarity of HCl acid by...
  img
Sunil Kumar FP 5 days ago
 
But one of the conditions of back Titrations are B should not react with impure substance (c)
 
RON 4 days ago
Normal 0 false false false EN-US X-NONE X-NONE This section contains multiple questions. Each question contains STATEMENTS 1 (Assertion) and STATEMENT 2 (Reason). Each question has 4 choices...
 
 
Dipole moment = (charge) χ (distance between the charges) Charge is same for Both Cl and F but Bond Length of Cl-C is > F-C = 1.78 A o and 1.39A o respectively. Dipole moment of...
  img
Akshay Meena 8 months ago
 
Dipole moment = (charge) χ (distance between the charges) Charge is same for Both Cl and F but Bond Length of Cl-C is > F-C = 1.78 A o and 1.39A o respectively. Dipole moment of...
  img
Akshay Meena 8 months ago
what id the symbol of sodium?
 
 
The symbol of sodium is Na. Thanks & Regards Aarti Gupta askiitians Faculty
  img
Aarti Gupta 2 months ago
 
the symbol of sodium is Na [Natrium]
 
manasa gorthy 2 months ago
 
sure?
 
Samrat 2 months ago
View all Questions »