写出下列转变的机理 CH. CH3 HaC CH HF H3C. CH CH3 CHEC CH3 C(CH3)3 芳环烷基化反应的逆过程H3C CH3 CH3 C(CH3)3 HF H3C CH3 CH3 + CH2 C CH3 CH3 写出下列转变的机理 芳环烷基化反应的逆过程