一段双功能催化剂的描述没太看懂求助??bi-functional catalysts for the cathodic and anodic reaction of alkaline fuel cells and electrolyzers 问下这个描述是指的orr和hor 催化剂 嘛,没太看懂啥意思,后面还弄了个 电解池 ,谢谢 查看更多1个回答 . 16人已关注
求教,5-溴甲基水杨醛的合成?计划使用5- 甲基 水杨醛制备 5-溴 甲基水杨醛,找到一篇文献 Regioselective Synthesis of Bromo-Substituted 3-Arylcoumarins 5-Bromomethylsalicylaldehyde (6) To a soln of 5-methylsalicylaldehyde (1) (2.0 g, 14.69 mmol) in CCl4 (23.0 mL), under reflux and with tungsten light irradiation (300 W, Philips Reflector R125 35°), was added Br2 (3.29 g, 20.57 mmol) over a period of 3 h. The soln was stirred at r.t. for a further 15 h and the resulting precipitate was filtered and washed with CCl4 to give aldehyde 6. 然后照着做一直做不出来,室温搅拌15h的时候不用钨灯照射无固体产生,用钨灯照射固体产物很少氢谱也不对,试了很多次了。 有做相关的大神么,求教下相关技巧。 上氯甲基倒是很容易查看更多1个回答 . 7人已关注