问题6.5写出下列反应的主要产物的结构式 CH3 NaOEt EtOH CH(CHg)2 CH(CHg)2 NaOEt EtOH CHg 'ci Br .CH3 NaOEt H EtOH CHg Br .CHg NaOEt .CH3 EtOH HCl CH(CH3)2 CH3 NaOEt EtOH EtOH NaOEt CH3 CH(CH3)2 Cl Br CH3 CH3 H H CH3 CH3 Br EtOH NaOEt EtOH NaOEt 问题6.5 写出下列反应的主要产物的结构式