Question

which of the following is the most stable species ph3C+,ph2C+H2,ph2C+H2,C+H3​

Answer 1

The most stable species is ph3C+

• As , it contain phenyl ring so by means of resonance it disperse the positive charge on the carbon .

• The more the dispersion of the positive charge ,the more stable is the carbocation species.

• In case of ph2C+H and phC+H2 there is two and one phenyl ring respectively so the extent of dispersion is less as compare to ph3C+ so it is less stable than ph3C+. Hence , the most stable species is ph3C+.

• In case of C+H3 , it doesn't contain any phenyl ring so no resonance and no dispersion of the positive charge . Hence, it is the least stable.