Use Coupon: CART40 and get 40% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list


what is the stability of aryl carbocations?

5 years ago


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

5 years ago

Post Your Answer

Dear Sirs The question is arrange the given in increasing ionic radii. Na+, Li+, Mg2+, Be2+ (The given sequence is actually also the ansewer). While comparing Na+ and Mg2+ I know that Na+...
Hi Student For isoelectronic species the cation with high positive charge has less atomic radii because of increase in the Z effective from the nucleus
Harishwar 4 months ago
see, these are exceptions kind of. Li is in the second period and we know that second period elements show anomalous behaviour. you are right in saying that Mg has an extra shell but you...
Neeti 4 months ago
thanks sir for the answer. But i already know how to compare isoelectronic species . What i want to know is that how to compare Mg2+(10e) and Li+(2) in terms of ionic radii. they are not...
Shiv Shukla 4 months ago
Bis­muth formula
Bi is formula for Bismuth
Gavvala Ganesh 3 months ago
bismuth, Bi
RAKESH CHINDAM 3 months ago
Bi is the formula for Bismuth.
OUTPASS 2 months ago
melting point of diamond?
3927 degrees C.
pa1 2 months ago
Diamonds melting point is 3927 degrees c. Diamond is a composition of Carbon. Diamond didnt has an chemical formula because it is an allotropy of Carbon.
diamond has high melting point that is 3927C.
Eswar 2 months ago
dear sir please answer this question what is x-ray scatering effect
X-ray scatering effect: A beam of X rays is directed at a mounted crystal . Atoms in the crystal absorb some of the incoming radiation and then remit it.
Compton scattering is the inelastic scattering of a photon by a charged particle, usually an electron. It results in a decrease in energy (increase in wavelength) of the photon (which may...
WAVE SCATERING EFFECT it this is called remit some of the incoming radiation and then absorb . Atoms in the crystal mounted crystal A beam of X rays is directed at a
RAKESH CHINDAM 3 months ago
Activation energy is high then what is rate of reaction..........
Activation energy is high then what is rate of reaction is slow.
Gavvala Ganesh 2 months ago
rate of reaction is low
L GOUSE BASHA 2 months ago
L GOUSE BASHA 2 months ago
what is the chemical formula of chabazite?
chabazite is Ca[Al2Si4O12].6H2o the chemical formula of
BOLLU SRINIVAS 2 months ago
(Ca0.5,Na,K)4[Al4Si8O24]•12H2O chemical formula of chabazite
RAKESH CHINDAM 2 months ago
View all Questions »
More Questions On Organic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details