题目内容

下列化合物能在乙醚中制备格氏试剂的是:

A. p-H2NC6H4Br
B. C6H5Br
C. p-HOC6H4Br
D. C6H5Cl

查看答案
更多问题

常见的核磁共振氢谱图的内标试剂(d = 0)为()

A. TMS
B. DMSO
C. THF
DME

下列化合物中不能发生Friedel-Crafts的是()

A. 硝基苯
B. 苯
C. 甲苯
D. 氯苯

International Factoring can increase liquidity to finance working capital and enhance the exporter’s borrowing potential. ( )

The offer for 3,000 bicycles made by A&C Company remains ____ for a week.

A. firm
B. good
C. open

答案查题题库