CH CHS-「HH3scH--cHH3→ CH3 Br CH3 C--「HCH→ Product CH3 CH3 Stable cation CHPh SNI 3 CH-C CH CHPh 关 CH CHPh CH2 Br CH 3 CH3 CH3 Stable cation Product CH3O /> > >>CH2=CH >R2C->R2CH->CH3->H-CH3 C CH3 CH3 CHCH3 Br SN1 CH3 C CH3 CH3 CHCH3 CH3 C CH3 CHCH3 CH3 Product CH3 C CH3 CH3 CHPh CH SN1 3 C CH3 CH3 CHPh Br Product CH3 C CH3 CHPh CH3 CH3O ＞ ＞ Cl ＞ CH2 =CH ＞ R3 C ＞ R2CH ＞CH3 ＞H Stable cation Stable cation