Carbocation is a positively charged carbon ion(C+). It is an intermediate generally formed during organic reactions. They exhibit a special quality called 'rearrangement' by virtue of which less stable carbocations can rearrange to form more stable carbocations during the reaction. The actively ...

learn more… | top users | synonyms

2
votes
1answer
63 views

Instability of vinylic and arylic carbocations

I have checked the net a lot and read quite a few books, but I still am not able to understand why vinylic and arylic carbocations are so unstable. Can someone please help For arylic carbocation, the ...
1
vote
3answers
112 views

Stability of cyclobutyl methyl carbocation

I know that cyclopropyl methyl carbocation is exceptionally stable compared to say, benzyl carbocation. But I want to know how stable is cyclobutyl methyl carbocation compared to say, ...
0
votes
1answer
161 views

Why does carbocation stability increase in the order 1°, 2°, 3°?

I'm reading about $\:\mathrm{S_N1}$ and $\:\mathrm{S_N2}$ reaction mechanisms. 1° carbocations are unstable to the point of not having been observed in solution, ever. 2° are more stable, and 3° ...
6
votes
1answer
258 views

Resonance in carbocation derived from allenes

During a reaction if addition on one of the $\pi$ bonds of an allene(containing even number of $\pi$ bonds like $\ce {H2C=C=CH2}$) takes place then a carbocation is formed. To decide the position of ...
3
votes
1answer
200 views

Preparation of alkyl halide from alcohols

$\ce{R-OH + HBr -> R-Br + H2O}$ An $\ce{R+}$ carbocation is formed during this reaction. If $\ce{R}$ is any alkyl group instead of methyl or ethyl, can the beta hydrogen to the hydroxy group be ...
3
votes
3answers
905 views

Why are isomers difficult to separate?

I recently learned that attempts to compare the spectra of two isomers of $C_3H_3^+$ were frustrated by the difficulty of separating the two species. What makes these isomers difficult to separate?
10
votes
1answer
245 views

Precedence of 1,2 carbocation rearrangement

How can one choose which group has more shifting tendency in 1,2 carbocation rearrangement? The obvious order is via the stability of the carbocation of the group. But, phenylic groups have high ...