词汇dropwise add 释义dropwise add dropwise add发音 意思翻译 逐滴添加 相似词语短语 dropwise───adv.逐滴地,一滴一滴地,水滴状地 drop dead───vi.倒毙;去死吧! drop dead!───vi.倒毙;去死吧! drop seat───折叠座椅;活裆 drop seats───折叠座椅;活裆 ...
dropwise add 生词本: 添加笔记: 有奖纠错 | 划词 词组搭配 英语例句库用户正在搜索 boatable, boatage, boatbill, boat-deck, boatel, boater, boatfall, boat-harbor, boatheader, boathook, 相似单词 3G, 401(K), a, 历史记录 生词本赞助商链接...
4、DIBAL 还原酰胺【常用还原剂---DIBAL】 A solution of the material (250 mg, 0.80 mmol) in dichloromethane (10 mL) was cooled to0°C, then DIBAL-H (7.4 mL, 7.4 mmol of 1M in toluene) was added dropwise into thesolution over 45 min. The mixture was stirred...
The drop-wise addition is always the best way of mixing the two reactants. Direct mixing in one portion may cause dramatic change in a short period of time,
In addition, the device include each pair of an optical switch element (SWi) attack at least two positions be connected to filter element mutually cope in its first position, switch second port B is added dropwise filter unit and to second port (B groups) should add filter device in this ...
To a suspension of4-amino-2-chloro-3-methyl-benzonitrile (500 mg, 3.00 mmol) in 1.8 mL of 6 N HClat room temperature was added 2 mL of water followed by a solution of NaNO2(220mg, 3.13 mmol) in 1 mL of water dropwise and the suspension stirred at roomtempe...
(0.5 mole) of methyl iodide to a suspension of 12.2 g (0.5 mole) of Mg turnings in 150 ml dry ether.Adding a crystal of iodine speeds up the reaction.After about 1/2 hour standing,cool the Grignard reagent to 0°C and add dropwise the aldimine obtained in the previous step (this ...
The crude acid chloride was added dropwise over 20 min to the ammonia solution with rapid stirring. After the addition was complete, the reaction was stirred vigorously at 0°C for 1 h. The bis-amide product precipitated from the reaction mixture. The dark solid was isolated by filtration ...
Pptd. silica prodn. by hydrolysis of silicon tetra:chloride - by dropwise addn. of water or silicon tetra:chloride to other reactant which is mixed or dissolved in organic solventPptd. silica prodn. by hydrolysis of silicon tetra:chloride - by dropwise addn. of water or silicon tetra:ch...
Why is it important to add 1 M HCl dropwise to the crucible? When Mg-EDTA is added to a sample to compensate for a lack of Mg^{2+}, why is no blank correction necessary? Why should excess alkali be avoided in the ferric chloride test for Aceti...