• # question_answer 56)   Which of the following are correct? (a)$C{{H}_{3}}-O-CH_{2}^{\oplus }$is more stable than $C{{H}_{3}}-CH_{2}^{\oplus }$ (b) ${{(C{{H}_{3}})}_{2}}C{{H}^{\oplus }}$is less stable than $C{{H}_{3}}-C{{H}_{2}}-CH_{2}^{\oplus }$ (c)  $C{{H}_{2}}=CH-CH_{2}^{\oplus }$is more stable than $C{{H}_{3}}C{{H}_{2}}CH_{2}^{\oplus }$ (d) $C{{H}_{2}}=C{{H}^{\oplus }}$is more stable than $C{{H}_{3}}-CH_{2}^{\oplus }$

(a, c) is stabilized by strong resonance effect while $C{{H}_{3}}\to -\overset{+}{\mathop{C}}\,{{H}_{2}}$is stabilized by only weak $+I$ effect of $C{{H}_{3}}$ group. is stabilized by strong resonance effect while $C{{H}_{3}}C{{H}_{2}}\to -\overset{+}{\mathop{C}}\,{{H}_{2}}$ is stabilized by weak $+I$ effect of the $C{{H}_{2}}C{{H}_{3}}$ group.