(12分)写出下列有机物的系统命名或结构简式: (1)
(2)CH 3CH(CH 3)C(CH 3) 2CH 2CH 3 _________________________________ _______________________________ (3)
(4)
_________________________________ _______________________________ (5)2,2-二甲基-3-乙基己烷 (6)2-甲基-2-丁烯 _________________________________ _______________________________