CH3CH2OCHCH2 CH3 HI CH3 CH2I CH3Ch2 CHOH (Imol) CH3CH,OCH, CH,CHE CH3CH2OCH2 CH2CH CH3CH21+ CH3 CH2CH2OH SN1机理 适于叔烷基醚 (CH3)3COCH3 HI =(CH3)3COCH3 + (lmol H (CH3)3COCH3 (CH3)3C+ CH3OH (CH3)3C+ I (CH3)3 (CH3)3 COCH3 HI (CH3)3CI+ CH3OH• S N1 机理 适于叔烷基醚 CH3CH2I + H+ _ CH3CH2CH2OH HI CH3CH2OCH2CH2CH3 I CH3CH2OCH2CH2CH3 CH3CH2OCH2CH2CH3 + HI CH3CH2I + CH3CH2CH2OH (1mol) (CH3)3COCH3 + HI (1mol) H+ (CH3)3COCH3 + I _ H+ (CH3)3COCH3 (CH3)3C+ + CH3OH (CH3)3C+ + I_ (CH3)3CI (CH3)3COCH3 + HI (CH3)3CI + CH3OH (1mol)