Chemistry - GOC Question with Solution | TestHub

$\mathrm{P}{\mathrm{h}}_3{\mathrm{C}}^{+}$ removes a hydride ion from the $\mathrm{s}{\mathrm{p}}^3$ $\mathrm{C}{\mathrm{H}}_2$ group. The cation formed is the tropylium cation, which has 6 π electrons (4n+2, n = 1) and is aromatic.