查询词典 alkoxide

Third, most magnesium alcoholates are prepared by alcoholysis.The process is based on the exchange of alkoxide groups of a metal alcoholate in the presence of an alcohol other than the alcohol corresponding to the original alkoxide,i.e.on the alcoholysis of a metal alkoxide with a different alcohol. Primary alcoholates can be prepared by this process,such as magnesium di-n-propanolate,magnesium di-n-butanolate,magnesium di-isobutanolate.

该方法适用于较高沸点的伯醇的醇镁化合物，例如正丙醇镁、正丁醇镁、异丁醇镁等，但是用醇解法制备出的叔丁醇镁，其纯度只有80％，这是由于叔丁醇具有较大的空间位阻效应，阻碍了醇交换的进一步进行，并且叔丁醇沸点与甲醇相差不大，使得甲醇难以快速蒸出，只能得到一种混合醇盐产物。

Third, most magnesium alcoholates are prepared by alcoholysis.The process is based on the exchange of alkoxide groups of a metal alcoholate in the presence of an alcohol other than the alcohol corresponding to the original alkoxide,i.e.on the alcoho- lysis of a metal alkoxide with a different alcohol. Primary alcoholates can be prepare- d by this process,such as magnesium di-n-propanolate,magnesium di-n-butanolate,m- agnesium di-isobutanolate.

该方法适用于较高沸点的伯醇的醇镁化合物，例如正丙醇镁、正丁醇镁、异丁醇镁等，但是用醇解法制备出的叔丁醇镁，其纯度只有80％，这是由于叔丁醇具有较大的空间位阻效应，阻碍了醇交换的进一步进行，并且叔丁醇沸点与甲醇相差不大，使得甲醇难以快速蒸出，只能得到一种混合醇盐产物。

Two steps were included in this reaction, first, sodium alkoxide was synthesized by th reaction between sodamide and cedrol, then cedrol methyl ether was synthesized by methylation reaction between sodium alkoxide and dimethyl sulfate.

反应分两步，首先氨基钠与柏木脑反应生成醇钠，然后醇钠与硫酸二甲酯进行甲基化反应生成甲基柏木醚。

In the last part of the thesis, synthesis of mesostructured titania has been explored with a selfassembly of hydrophilic polymer and anionic surfactant used as template, along with titanium alkoxide as inorganic precusor. The product was proved to have mesostructure and the fiber and spherical morphology is favored.

本文最后一部分首次探索以亲水性高分子和阴离子表面活性剂形成的自组装体为模板、烷氧基钛为无机原料合成介相结构氧化钛；产物具有介相结构，其颗粒形貌为纤维和圆球的混合物。

The chemical structure, characteristics of aluminium alkoxide and its application in coating industry are given in this article.

一、前言现代技术和工业的发展，对涂料的机械强度、耐热、耐腐蚀等性能提出了更高的要求。

Generally,γ-Al〓O〓 membranes are made of alkoxide, which is high in prices.

Al〓O〓膜发展至今，仍存在着几个极富挑战性的课题有待解决。首先是价格昂贵。

The double alkoxide solution was added to the ME and stirred for 12 h.

双金属醇氧化物溶液加入ME中振荡12小时。

The results of analysis have indicated that, in comparison with the direct dehydrogenation reaction, the coverage of alkoxide is decreased with the increase of the adsorption of acetone.

在直接脱氢反应动力学分析的基础上，将这一方法扩展到更为复杂的氧化脱氢反应中，采用如下的机理对担载银催化剂上异丙醇氧化反应动力学进行了拟合分析。

This thesis focuses on the studies on the synthesis, characterization and thermalstability of organolanthanide thiolate and alkoxide complexes.

为此，本文着重对茂基或茚基稀土烃硫基、烷氧基配合物的合成、性质及其热稳定性进行了较系统的研究。

The precursor solutions of titanium alkoxide with different amount of AcAc were characterized by DTA to study the chelating process of titanium alkoxide with AcAc.

对含有不同量乙酰丙酮的前驱体溶液做了热重分析，研究了钛酸丁酯与乙酰丙酮的螯合过程。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。