羧酸衍生物发生亲核取代反应的活性次序为() 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

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

羧酸衍生物发生亲核取代反应的活性次序为() 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’

羰基化合物RCOR、RCOCl、RCOH和RCOF中，C=O伸缩振动频率最高是? RCOR|RCOH|RCOF|RCOCl

下列常用酰化试剂，活性最大的是（ ）‌​‌ A: RCOCl B: RCOOH C: RCOOCOR’ D: RCOOR’

下列常用酰化试剂，活性最大的是（　 　） A: RCOCl B: RCOOH C: RCOOCOR’ D: RCOOR’