| 摘要 |
NEW MATERIAL:The Schiff base-type biscrown ether of formula I (m is 3 or 4). USE:A potassium absorbent. Acomponent of potassium-selective electrode. The compound has strong selective coordination activity to a potassium salt. PREPARATION:The compound of formula I can be prepared by reacting the formyl benzocrown ether of formula II with a hydrazine compound.
|
