CH3+\mathrm{CH}_{3}^{+}CH3+
(CH3)2C+H\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}^{+} \mathrm{H}(CH3)2C+H
H2C+−CH3\mathrm{H}_{2} \mathrm{C}^{+}-\mathrm{CH}_{3}H2C+−CH3
(CH3)3C+\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}^{+}(CH3)3C+
