问题 问答题

(8分)【化学-有机化学基础】

北京市疾病预防控制中心的调查结果显示,在北京市场上有九成受检香水和三成护发类化妆品被查出致癌物”邻苯二甲酸酯”(PAEs),值得注意的是,在儿童护肤类化妆品中亦有两件样品分别被检出邻苯二甲酸二乙酯(DEP)和邻苯二甲酸二(2-乙基己基)(DEHP)。

(1)邻苯二甲酸二乙酯(DEP)的结构简式为           ,其核磁共振氢谱共有   组吸收峰,峰面积之比为    

(2)以下是某课题组设计的合成邻苯二甲酸二乙酯(DEP)的路线:

已知:

①C的结构简式为         ,其一溴代物有    种。

②反应Ⅰ属于      反应,反应Ⅲ属于      反应。

③D和乙二醇在一定条件下可以发生反应生成一种高分子化合物,写出化学方程式               

答案

(1分)     4  1:1:2:3(1分)

⑵① (1分)  3(1分) ②加成(1分) 酯化(或取代(1分))

+HOCH2CH2OH+2nH2O(2分)

⑴邻苯二甲酸二乙酯为邻苯二甲酸和乙醇的酯化产物,结构简式为。一般同一个碳原子上的氢原子是相同的,同一个碳原子所连接的甲基上的氢原子是相同的,具有对称性结构(类似于平面镜成像中物体和像的关系),所以根据邻苯二甲酸二乙酯的结构简式可知,分子中含有4种类型的氢原子,个数比为1:1:2:3。

⑵①邻苯二甲酸二乙酯为邻苯二甲酸和乙醇的酯化产物,所以B是乙醇,D是邻苯二甲酸,C氧化生成D,则C为,含有三种类型的氢原子,一溴代物有3种。

②乙烯和水反应加成反应,即生成乙醇,所以A是乙烯,反应Ⅰ为乙烯和水的加成反应。反应Ⅲ为邻苯二甲酸和乙醇的酯化反应。

⑶邻苯二甲酸含有羧基,乙二醇含有羟基,所以二者可发生缩聚反应生成高分子化合物,结构简式为

不定项选择题
阅读理解

阅读理解。

     Today we talk about proverbs. A proverb is a short, well- known saying that expresses a common truth

or belief. Proverbs are found in most cultures and are often very old.

     In American history, Benjamin Franklin was famous for his proverbs. He lived in the 1700s and was a

leader of the American Revolution against English rule. He was also a scientist, inventor and writer.

     Franklin published a book called Poor Richard's Almanac. He included many proverbs he had heard or

created. Some of them are still used today, like:" Early to bed and early to rise makes a man healthy, wealthy

and wise."

     Here are other examples of proverbs that Americans use. The first ones are about love. Some people say,

" All is fair in love and war." They mean that anything you do in a relationship or in battle is acceptable.

     Another proverb about love is," Absence makes the heart grow fonder." This means you love someone

even more when he or she is far away. But other people say,"out of sight, out of mind."You may not even

think about that person when he or she is not with you. Which of these proverbs do you think is most true?

      Another proverb says " Love is blind." In other words, when you are in love with someone, you may

refuse to see anything bad about that person.

     Some people are only interested in having a relationship with someone who is very good-looking. You

might tell them that "Beauty is only skin deep." Your girlfriend may be lovely to look at, but she may also have

some bad qualities. Or your boyfriend is a wonderful person, but not good-looking. So what a person looks

like is not really important.

     Sadly, we have no more time for this program. So we must say,"All good things must come to an end."

Thanks for listening.

1. Which of the following is a proverb?

A. I love you more than I can say.

B. Mind your own business.

C. When in Beijing, please call me.

D. Rome wasn't built in one day.

2. From the passage, we know the following about Franklin except ____.

A. he was good at creating and collecting proverbs

B. he was a fighter who was strongly against English rule

C. he was a person who lived more than 400 years ago

D. there were many proverbs in his book Poor Richard's Almanac

3. Most proverbs mentioned in this passage are about _____.

A. wealth and health

B. love and relationship

C. beauty and truth

D. work and studies

4. What is this passage likely to be used for?

A. An English TV program.

B. An English radio program.

C. An English speech contest.

D. An English textbook.