(1)CH3 CH, COCH3 (2) CH3 CHBr2 (4)CsHs CH(CH3)2 (6)CH」3 CHCICHC2 答案: Br 6.94694 PPMCH3CH2COCH3 (4) C6H5CH(CH3)2 (5) (6) CH3CHClCHCl2 (3) (1) CH3CHBr2 (2) 答案： 0.96 2.29 5.37 Br Br 6 5 4 3 2 1 0 PPM 6.94 6.94 6.946.94 2.19 2.19 8 7 6 5 4 3 2 1 0 PPM