(3)CH3CH2CHCH (BH3)z H O 2 ? oH 解:CH3CH2H=CH2 (BHh (CH3CH2CH2CH2)3B H2O o-3CH3CH2 CH2CH2OH H3BO3 oH H,0 (4) CH H 解:CH2 CH? H? CH? 2 CH3CCH3+ HCH (5)Ch 稀KMnO CH2 ? CH3 CH 稀KMn 解:CH-C一CH2-cH:--H2+MnO小+KO 冷 OHOH