查询词典 ethoxide

Michael addition reaction must be carried out in the base of the catalyst, the alkali used are: sodium, sodium ethoxide, sodium hydride, sodium amide ...

迈克尔加成反应必须在碱的催化下进行，常用的碱有：金属钠、乙醇钠、氢化钠、氨基钠。。。

The structures of these two molecules are almost the same with slight differences in bond lengths and bond angles. And compounds 1-3 are the first examples of this type containing amido and ethoxide groups.

而且到目前为止，Sn4O4的梯子状结构中同时含有氨基和乙氧基的化合物还未见报道，化合物1，2和3为首次合成此类化合物。

However, if the solution is also made in sodium ethoxide after the same treatment , the major product is found to be 4-t-butylcyclohexene.

然而，如果是在乙氧基钠中经过同样的处理则主要产物是4-t-丁基环己烯。

In the fourth chapter, 5-phenyl-1,2,4-triazine(3) was synthesized from(5-phenyl-1,2,4-trizin-3-yl)hydrazine in the presence of sodium ethoxide firstly. Themerit of this process was simplification of operation and good yield (more than 90%),which to our knowledge has not been reported so far in literature.

第四章首先以(5-苯基-1，2，4-三嗪-3-基)肼为原料，在乙醇钠作用下经一步反应，合成了化合物5-苯基-1，2，4-三嗪(3)；该法操作简单，产率高(＞90％)，迄今未见文献报道。

When methoxyethanol was used as the solvent,tantalum ethoxide can be chemically modified with acetic acid to producetantalum alkxo-acylate precursor, and therefore the hydrolysis of 〓can be slowed down.

在以乙二醇单甲醚为溶剂时，乙醇钽与醋酸作用生成乙醇钽的乙酰基配位化合物，可以减弱水解反应的进行。

In this paper, titanium ethoxide was synthesized by the direct electrochemical method. The production was characterized by Raman spectra. The effects of different factors on the voltage, current efficiency, material yield and space-time yield were investigated.

采用直接电化学法合成乙醇钛，采用激光拉曼光谱对产物进行了表征，详细探讨了电解时间、电流密度、支持电解质浓度、电解液温度以及电极间距对槽电压、电流效率、产物收率和时空产率的影响。

Ethyl 4,4,4-trifluoroacetoacetate was synthesized from ethyl acetate and 4,4,4-trifluoroacetate(mole ratio 3:1) with sodium ethoxide.

乙酸乙酯与三氟乙酸乙酯(摩尔比为3∶1)在乙醇钠作用下进行克莱森酯缩合反应，得到三氟乙酰乙酸乙酯。

Titanium ethoxide was directly prepared using titanium as sacrificial anode in absolute ethanol.

采用海绵钛为&牺牲&阳极，在无隔膜电解槽中，电化学一步法制备了纳米TiO2 前驱体钛酸乙酯Ti 4 。

The reaction proceeds by ethene chemical adsorption to form the surface ethoxide and the C-C bond formation between the ethoxide and the second ethene molecule to form the butoxide product.

乙烯化学吸附生成的烷氧化合物与物理吸附的乙烯分子发生二聚反应生成新的C-C键同时生成新的烷氧化合物。

For the stepwise mechanism, the ethylene molecule was firstly adsorbed at the Brnsted acid site via π-hydrogen bonding to form a stable complex, which then went through the protonation, leading to the formation of the ethoxide intermediate. Furthermore, the ethoxide reacted with the second ethylene molecule to form the butoxide product.

对于分步反应机理，乙烯分子首先通过π-氢键作用在酸性位形成稳定的吸附络合物，再进一步发生质子化并生成乙醇盐中间体，随后乙醇盐与第二个乙烯分子发生碳－碳键结合形成丁醇盐产物。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。