methylene fluoride
英
美 [ˈmɛθɪˌlin ˈflɔːraɪd]
网络 二氟甲烷
双语例句
- The carbonyl methylene condensation reaction of aromatic aldehydes with ethyl cyanoacetate has been carried out smoothly in the presence of potassium fluoride only giving E isomers in high yield.
在氟化钾催化下，芳香醛与氰乙酸乙酯发生羰基与活性亚甲基的缩合反应，高收率地得到缩合产物，且只得到E式产物。 - Four active cyclopropane compounds 2a-2d were synthesized using active methylene ( 1a-1d) and 1, 2-dibromoethane with potassium fluoride soaking alumina as a strong base under the condition of solid-liquid phase transfer catalysis, and the reaction mechanism was discussed in this paper.
以氟化钾浸渍的氧化铝为强碱，在固液相转移催化条件下，由活泼亚甲基化合物（1a～1d）与1，2－二溴乙烷合成了4种活性环丙烷化合物2a～2d，并探讨了其反应机理。 - Electron Momentum Spectroscopy of Inner Valence Orbitals 3a_1 and 2b_2 of Methylene Fluoride
二氟甲烷分子3a1和2b2轨道的电子动量谱