问题 推断题

1,3 -丁二烯是非常重要的有机化工原料。以下是合成PHB(一种可降解的塑料)的路线。 已知

完成下列填空:

(1)写出C的结构简式:____________。反应④的反应条件________。

(2)上述转化过程中属于加成反应的是___________(填序号)。

(3)反应②符合绿色化学思想(碳原子的利用率为100%),则A的结构简式为:________。

(4)核磁共振氢谱可以确定有机物分子中不同化学环境氢原子的种类。例如,核磁共振氢谱表明

CH3CH2OH中有三种不同化学环境的氢原子。物质C有一同分异构体,能发生银镜反应,且核磁共振氢谱表明该化合物只有两种不同化学环境的氢原子,写出该化合物的结构简式:____________

答案

(1);浓硫酸、加热

(2)①③

(3)CH3-CC-CH3

(4)OHC-CH2-O-CH2-CHO

完形填空
完形填空。
     Last Sunday we had a fantastic trip. My father, my mother and I __1__ to summer camp. We went to the mountains. First we __2__ to the foot(脚) of the mountain __3__ bus. In the middle of the mountain there was a river(河). The water was clean. I washed my face(洗脸) __4__  the water. It was warm. There __5__  some fishes in the river. In the mountain there were flowers(花). They were very __6__ . At 12 o'clock, many people got together (在一起), and they were very __7__ . We made our lunch in the mountain. The food was very   _8_  , and we liked it very much. After lunch, we went on our trip. Last, we got to the top (顶) of the mountain. We were very   _9_  . It was really   _10  .

(     )1. A. go 
(     )2. A. get    
(     )3. A. by     
(     )4. A. on  
(     )5. A. is      
(     )6. A. ugly    
(     )7. A. smart   
(     )8. A. awful    
(     )9. A. happy   
(     )10. A. terrible

B. goes    
B. got     
B. on      
B. with    
B. were    
B. hungry  
B. sad     
B. terrible
B. unhappy 
B. cold      

C. going      
C. gets       
C. over       
C. in         
C. was        
C. beautiful  
C. busy       
C. expensive  
C. interesting
C. fun        
D. went     
D. getting  
D. with     
D. for      
D. are      
D. tired    
D. difficult
D. delicious
D. sad      
D. rainy    
填空题