查询词典 ethoxide

Then sodium ethoxide was used as base,the nucleophilic substitution of 2-pyrrolidone with the intermediate provided nefiracetam.

以碳酸钠为缚酸剂，摩尔比为1︰1的2，6-二甲基苯胺与氯乙酰氯反应合成了中间体2-氯-N-(2，6-二甲基苯基)乙酰胺；在强碱乙醇钠作用下，2-吡咯烷酮再与2-氯-N-(2，6-二甲基苯基)乙酰胺经亲核取代合成了目标化合物奈非西坦。

Ea for the concerted mechanism was 167.24 kJ/mol, while it was 155.20 kJ/mol for the formation of ethoxide intermediate in the stepwise mechanism.

比较苯与乙醇和乙烯发生烷基化反应的机理可以看出，二者作为烷基化试剂对烷基化反应性能影响不大。

The LiTaO3 thin film was chosen as infrared sensing film and prepared by a sol-gel process using lithium acetate and tantalum ethoxide as starting materials. The fabrication process of device is discussed in details.

用醋酸锂和乙醇钽作为起始反应物，通过溶胶凝胶工艺生成了对红外敏感的钽酸锂薄膜，并详细讨论了基于钽酸锂薄膜的红外探测器件制备工艺。

The Ea for the formation of ethoxide intermediate was 170.34 kJ/mol. Alkylation of benzene with ethylene occurred through both concerted mechanism and stepwise mechanism, and they were competitive to each other. These two paths were only slightly different in the activation energy.

而乙烯作为烷基化剂与苯反应时同时存在联合机理和分步机理，且二者之间存在一定程度的竞争，其中联合机理的活化能为167.24 kJ/mol，分步机理速控步骤的活化能为155.20 kJ/mol。

The polymeric sol is obtained by process of preparing a calcium salt solution, containing calcium ethoxide dissolved in organic acid, and a phosphate solution, containing triethyl phosphite or triethyl phosphate dissolved in the organic acid, mixing the calcium salt solution with the phosphate solution to produce a mixed solution, and aging the mixed solution.

本发明的磷酸钙化合物的聚合物溶胶是通过如下步骤制备的：制备含有溶解在有机酸中的乙醇钙的钙盐溶液和含有溶解在该有机酸中的亚磷酸三乙酯或磷酸三乙酯的磷酸盐溶液；及将该钙盐溶液和该磷酸盐溶液混和制得混合溶液，并老化该混合溶液。

In this thesis, the polymerization of triblock copolymer of styrene-butadiene-methyl methacrylate was carried out in glass flask ,with n-BuLi as initiator, 1,1-diphenylethylene as capping agent and Lithium 2(2-methoxyethoxy) ethoxide as additive.

本论文以n-BuLi为引发剂、1，1-二苯基乙烯为戴帽剂、2-(2-甲氧基乙氧基)乙氧基锂为添加剂，对玻璃聚合瓶中非极性-极性三嵌段共聚物聚苯乙烯—聚丁二烯—聚甲基丙烯酸甲酯的合成进行了研究。

When the amount of hydrochloric acid added in hydrolysis process of aluminum ethoxide was relatively high, the formed AlCl〓 could enhance the self-pulverization of fibrillar γ-AlOOH powders during its dehydration process and lead to the formation of amorphous ultrafine alumina powders with the particle size of 3～5nm, which could melt and become glass like at 500℃, and then become spherical by crystallization.

当盐酸与乙醇铝的摩尔比从0.0增加到0.04时，粉末成球温度从1200℃降到500℃；在高酸量时形成的AlCl〓，能促进γ—AlOOH脱水时的自粉碎效应，生成无定形的超细Al〓O〓粉末，粒径为3~5nm，在500℃经熔化形成玻璃态，再晶化成球，而在其它情况下，粉末靠收缩经表面扩散方式成球。

The long wave ultraviolet grass green fluorescence function material is synthesized with the p-toluensulfonyl chloride and o-amino benzoic acid as raw materials,pyridine as solvent,and sodium ethoxide as activator.

缑卫军，刘新奇，紫外长波草绿荧光功能材料的合成研究以对甲苯磺酰氯和邻氨基苯甲酸为原料，吡啶为溶剂，乙醇钠为催化剂，合成紫外长波草绿荧光功能材料。

Ib was synthesized by condensation of phthalic anhydride with 2-methylresorcinol in fused AlCl〓/NaCl (5∶1), followed by selective acetylation, methylation, NBS bromination and condensation with sodium ethoxide.

邻苯二甲酸酐在熔融的三氯化铝-氯化钠(5：1)中和-2，6-二羟基甲苯环合得1，3-二羟基-2-甲基蒽醌〓后经选择性乙酰化、甲基化、NBS溴化、乙醇钠缩合得1-甲氧基-2-乙氧甲基-3-羟基蒽醌。

9H2O, and niobium ethoxide Nb(OC2H5)5 as starting materials, ethylene glycol monomethyl ether (C3H8O2) as the solvent. 0.1BiFeO3-0.9SrBi2Nb2O9 thin films were prepared on fused quartz substrates using sol-gel processing.

9H2O和乙醇铌[Nb(OC2H5)5]作为起始原料，乙二醇甲醚[C3H8O2]作为溶剂配制掺Fe的SrBi2Nb2O9前驱体溶液，利用溶胶－凝胶法在石英衬底上制备出0.1BiFeO3-0.9SrBi2Nb2O9铁电薄膜。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。