问题 问答题

(11分)某芳香族化合物H常用作防腐剂,H可利用下列路线合成:

已知:①A是相对分子质量为92的烃;

④ D的核磁共振氢谱表明其有两种不同化学环境的氢(两种不同位置的氢原子),且峰面积之比为1:1。

回答下列问题:

(1)A的分子式为___________,由A→B的反应试剂和反应条件为____________。

(2)写出C→D的反应方程式:_________________________________________。

(3)同时符合下列条件的E的同分异构体共有____________种。

①分子中含有苯环  ②能发生银镜反应   ③能与FeCl3溶液发生显色反应。

(4)检验F中含氧官能团的试剂为____________(填试剂名称),由F→G的反应类型为______        。

(5)H的结构简式为_____________________________________。

答案

(1)C7H8、  Cl2、 FeCl3

(2)+3NaOH +NaCl+2H2O

(3)9; (4)银氨溶液(或新制氢氧化铜悬浊液或新制氢氧化铜),加成反应或还原反应;

(5)

题目分析:(1)因为A是相对分子质量为92的烃,是形成芳香族化合物H的原料,则A可能是芳香烃。根据分子式的脱水剂计算可知A分子式为C7H8。甲苯与Cl2在FeCl3催化作用下反应得到B:4—氯甲苯。该反应的方程式为:+Cl2+HCl; (2)与酸性KMnO4发生氧化反应得到C:4—氯苯甲酸;C与NaOH的水溶液在加热加压时发生反应得到D;该反应的方程式为+3NaOH +NaCl+2H2O 。D酸化得到E:;(3)同时符合条件①分子中含有苯环;②能发生银镜反应;③能与FeCl3溶液发生显色反应的E的同分异构体有9种,它们分别是。(4)CH2=CH2催化氧化得到乙醛CH3CHO,乙醛与乙醛在NaOH溶液中加热反应得到F:CH3CH="CHCHO." F中含氧官能团是醛基,检验的试剂为银氨溶液(或新制氢氧化铜悬浊液或新制氢氧化铜);F(CH3CH=CHCHO)与H2在Ni作催化剂时发生加成反应得到G:CH3CH2CH2CH2OH。(5)G:CH3CH2CH2CH2OH与发生酯化反应得到H:

完形填空
Recently divorced and unemployed,I was on my way downtown to do the rounds of the employment offices.I had no umbrella,for my old one had ____,and I could not ____ another one.
I sat down in the ____ and there against my seat was a(n) ___ silk umbrella with a silver handle.I had ____ seen anything so lovely.I examined the handle and saw a carved ___.The usual procedure would have been to ____ the umbrella to the conductor,but an idea ____ to me.I decided to take it with me and find the owner myself.
I got off the bus in a downpour and ____ opened the umbrella to protect myself.Then I ____ a telephone book for the name on the umbrella.I called and a lady ____.
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She was so excited that I ____ I was looking for a job and went directly to her house.She took the umbrella,and her eyes were filled with ____.She wanted to give me a ____,but-though twenty dollars was all I had in the world-her happiness at regaining this ____ possession was beyond words and I believed accepting her money would have ____ something.We talked for a while and I left.
A week later,I got a job as a sales manager ____.It might be my kindness that paid off.But who knows?
小题1:
A.broken upB.gone away C.fallen apartD.faded away
小题2:
A.affordB.borrowC.findD.repair
小题3:
A.officeB.busC.theaterD.train
小题4:
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小题5:
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小题6:
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C.open upD.carry away
小题8:
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小题9:
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C.casuallyD.thankfully
小题10:
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小题11:
A.appearedB.repliedC.answeredD.screamed
小题12:
A.in surpriseB.in panicC.in silenceD.in anger
小题13:
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小题17:
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小题18:
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小题19:
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小题20:
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C.hopefullyD.unexpectedly
单项选择题