(1)CH2 CH,CHCH, CH3CH2 CH2CH2CI CH3 (2)H2C=CHCH2 BI H3C-CH—Br ()C6H5 HC=CHCH2CI C6HsCH2CH2CH2CI (4)CH3 CH2CHCH CH3 CH, CHCH3 答案 (I)CHCh CHCH CH3 CH) CH2CH2CI CH3 (2)H2C=CHCH2Br>H3C-CH-Br ()C6HsHC=CHCH2Cl C6H5CH2 CH2CH2CI (4)CH, CH,CHCH CH3 CHCHCH3 问题86比较下列各对化合物进行S2反应的速度大小 H3 (1) H3CH2C H3C CH3 CH3 CH3 (2)H3C—C CHoCI CH3 CH, CH2C (3) CH3 CH,. Br CH3 CHCH2I (4)(CH3)2 Br (CH3)3C一CHBr 答CH3CH2CHCH3 Cl CH3CH2CH2CH2Cl H2C CHCH2Br H3C CH CH3 Br C6H5HC CHCH2Cl C6H5CH2CH2CH2Cl CH3CH2CHCH3 I CH3CH2CHCH3 Cl (1) (2) (3) (4) 答案： CH3CH2CHCH3 Cl CH3CH2CH2CH2Cl H2C CHCH2Br H3C CH CH3 Br C6H5HC CHCH2Cl C6H5CH2CH2CH2Cl CH3CH2CHCH3 I CH3CH2CHCH3 Cl (1) (2) (3) (4) > > > > 问题 8.6 比较下列各对化合物进行SN2 反应的速度大小。 H C CH3 H3CH2C C CH3 H3C Cl CH3 Cl C H CH3 H3C CH2Cl CH3CH2CH2CH2Cl CH3CH2CH2Br CH3CH2CH2I (CH3)2CHCH2Br (CH3)3C CH2Br (1) (2) (3) (4) 答案：