CH3-|||-由 合成 =0 。-|||-CH3
CH3-|||-10.由 合成 =0 。-|||-CH3
练习13.8(1)写出从(CH3)3 CCOOH转变为(CH3)3CCN的步骤。-|||-(2)如果想从(CH3)3 CBr与NaCN作用得到(CH3)3CCN
[单选题]N5-CH3-FH4的-CH3可用于合成()A .N5,N10=CH-FH4B .N5,N10-CH-FH4C .甲硫氨酸D . D.嘧啶E .嘌呤
CH3 一-CH b. CH3CHCH 2CHCHCH3-|||-CH2 -CH-CH-CH3 CH3 CH3-|||-CH3 CH3-|||-CH3 CH3
(66)解释下列事实:-|||-Br Br-|||-CH3CH=C-C H3→CH3 HBr a CH2C- - CH3 + CH3CH- -CHCH3-|||
命名下列化合物。(1)(CH3)3CC≡CCH2C(CH3)3 (4)(2)CH3CH=CHCH(CH3)C≡CCH3 (5)(3)HC≡CC≡CCH=CH2命
[单选题]CH3(CH2)2CH2+(Ⅰ);CH3CH+CH2CH3(Ⅱ);(CH3)3C+(Ⅲ)三种碳正离子的稳定性顺序如何?()A . (Ⅰ)>(Ⅱ)>(Ⅲ);B . (Ⅰ)<(Ⅱ)<(Ⅲ);C . (Ⅱ)>(Ⅰ)>(Ⅲ);D . (Ⅱ)>(Ⅲ)>(Ⅰ)。
[题目]-|||-(4) (H)_(3)-CH-C-C(H)_(3) __ ,__ -|||-CH3 CH3
[单选题]合成化合物CH3OC(CH3)3的最佳方法是()。A . 甲醇和叔丁醇分子间脱水B . 甲基氯和叔丁醇钠反应C . 甲醇钠和叔丁基氯反应