A solution of (-) - 1 - chloro - 1 - phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of:
carbanion
carbene
carbocation
free radical
Cl−C|Ph(−)H−CH3SbCl5−−−−−→ToluenePh−⊕CH−CH3carbocation+SbCl−6→Ph−CH|Cl−CH3+SbCl5
Solution of (+) -2-chloro -2- phenylethane in toluene racemises slowly in the presence of small amount of SbCl5, due to the formation of