下列化合物作为酰化剂时,它们的酰化活性由高到低排列正确的是
①RCOCl ②RCOOR′ ③(RCO)2O ④RCONH2
①RCOCl ②RCOOR′ ③(RCO)2O ④RCONH2
举一反三
- 将下列化合物按水解反应活性的大小排列成序:(A)RCOCl(B)RCOOR′(C)(RCO)2O(D)RCONH2
- 下列物质最易发生酰化反应的是()。 A: RCOOR B: RCOR C: RCOX D: (RCO)O E: RCONH
- 羧酸衍生物发生亲核取代反应的活性次序哪个是正确的? A: RCOCl > RCOOR’> RCOOCOR’> RCONH2 B: RCOCl > RCOOCOR’> RCOOR’> RCONH2 C: RCONH2 > RCOCl > RCOOR’> RCOOCOR’ D: RCONH2 > RCOCl > RCOOCOR’> RCOOR’
- 羧酸衍生物发生亲核取代反应的活性次序哪个是正确的? A: RCOCl > RCOOR’> RCOOCOR’> RCONH2 B: RCOCl > RCOOCOR’> RCOOR’> RCONH2 C: RCONH2 > RCOCl > RCOOR’> RCOOCOR’ D: RCONH2 > RCOCl > RCOOCOR’> RCOOR’
- 羧酸衍生物发生亲核取代反应的活性次序是哪一个? A: RCONH2 > RCOCl > RCOOCOR’> RCOOR’ B: RCONH2 > RCOCl > RCOOR’> RCOOCOR’ C: RCOCl > RCOOCOR’> RCOOR’> RCONH2 D: RCOCl > RCOOR’> RCOOCOR’> RCONH2