试题与答案

在有过氧化物存在的条件下,不对称烯烃与HBr加成的规律是:溴原子加在含氢多的碳原

题型:问答题

题目:

在有过氧化物存在的条件下,不对称烯烃与HBr加成的规律是:溴原子加在含氢多的碳原子上,如:

CH3-CH=CH2+HBr→CH3-CH2-CH2Br

现有分子式为C8H13O2Cl的有机物A,在一定条件下发生如图所示的系列变化:

已知:A分子中不含有甲基,试回答下列问题:

(1)写出下列有机物的结构简式:X______,Y______,A______,D______,E______,F______.

(2)写出下列反应的化学方程式(有机物用结构简式表示):

①A和NaOH溶液共热:______.

②X→C:______.

③E→F:______.

答案:

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“The people in b  54  countries are very friendly to f   55 . But they have different cultures. For example, when I spoke Chinese in China, the people there always showed s  56 on their faces. But when I came to Japan, I found it was o   57  . Most local people there hoped I could talk with them in Japanese, t   58  I was not good at it,” she said.

Amanda thought this might have something to d  59  with the fact that the western group in Japan is o  60  than the one in China. They have stayed in Japan for a long time. And most of them speak Japanese well. But Westerners in China are still quite a new group. They’re usually treated as guests and tourists.

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