8.
\(\rm{ < 1 > }\)写出下列有机物的系统命名或结构简式:
\(\rm{(1)_{\;\;\;\;}}\)\(\rm{{\,\!}_{\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;}}\)
\(\rm{(2)}\) \(\rm{CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{CH(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{)C(CH}\)\(\rm{{\,\!}_{3}}\)\(\rm{)}\)\(\rm{{\,\!}_{2}}\)\(\rm{(CH}\)\(\rm{{\,\!}_{2}}\)\(\rm{)}\)\(\rm{{\,\!}_{2}}\)\(\rm{CH}\)\(\rm{{\,\!}_{3}}\)
\(\rm{(3)}\) \(\rm{{\,\!}_{\;\;}2-}\)甲基\(\rm{-2-}\)丁烯
\(\rm{(4)_{\;\;\;}1}\),\(\rm{2-}\)二甲基\(\rm{-3-}\)乙基苯\(\rm{{\,\!}_{\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;}}\)
\(\rm{ < 2 > . ⑴}\) 中含有的官能团的名称为 _________________
\(\rm{(2)}\) 丁基的\(\rm{4}\)个结构简式为___________________________________________________________________