环烯
- 与 环烯 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Three kinds of novel N-heterocyclic carbene allyl palladium complexes (Catalyst 1, 2 and 3) were synthesized. Norbornene polymerizations were carried out using three catalysts activated with methylaluminoxane in toluene.
研究了以3种N-杂环卡宾螯合烯丙基钯配合物1、2和3为催化剂,甲苯为溶剂,甲基铝氧烷为助催化剂催化降冰片烯的聚合。
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This invention discloses an intermolecular charge transfer chromogen with triphenylamine group, with a formula indicated by (1), wherein: R1 is hydrogen atom or methyl group or methoxyl group, R2 is hydrogen atom or 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group.
本发明公开的含三苯胺基团的分子内电荷转移生色团,具有式1所示的结构式,其中R 1 为氢原子或甲基或甲氧基,R 2 为氢原子或2-(5,5-二甲基-3-乙烯环己烯基-2-烯亚基)丙二腈基。
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This invention applies mild condition uses substituent group triphenylamine aldehyde or triphenylamine dialdehyde as raw material to react by heating with 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group to produce the intermolecular charge transfer chromogen with high decomposition temperature, non-coplanar structure, and triphenylamine group.
本发明采用温和的手段,将取代基三苯胺单醛或取代基三苯胺双醛为原料与2-(3,5,5-三甲基环己烯-2-烯亚基)丙二腈共热生成具有高的热分解温度、非共平面空间结构的含三苯胺基团的分子内电荷转移生色团。
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Gasolinecontained 67.8% aromatic hydrocarbons, 21.47% olefins and a small quantityof alkanes and cycloparaffin hydrocarbons. The enlarging study on blending feed of vegetable oil and petroleumfraction was performed in a Two-Stage Riser.
通过优化各种因素,植物油的转化率达到81.18%,丙烯产率达到19.52%;汽油的产率为30.58%,其中含有67.87%的芳烃、21.47%的烯烃,以及少量的烷烃和环烷烃,其研究法辛烷值为90.3,抗爆指数为83.9。
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Systematic studies on the Hetero-Diels-Alder reaction between the o-Quinone methidesand different enol ether dienophiles for the construction of the spiroketal skeleton was described.
较系统地研究了邻甲基苯醌与不同的烯醇醚亲双烯体之间的Hetero-Diels-Alder反应对螺环缩酮结构的构筑及其应用。
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Based on our early work, we will discuss the coupling the Nazarov cyclization-halogenation reaction ofα-alkenoyl ketene dithioacetals under Vilsmeier conditions.
基于以上的研究,本文着重讨论了(来源:ABacC论文cece网www.abclunwen.com)α-烯酰基二硫缩烯酮在Vilsmeier试剂作用下的Nazarov环合反应。
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No reactions were observed for reactions of benzodiazepines with ketene atroom temperature; but the reaction of benzothiazepines with monochloroketene gave[2+2] cycloadducts .
发现在室温下苯甲酰基苯并二氮杂卓与烯酮没有反应,而苯并硫氮杂卓与一氯烯酮形成了正常的β-内酰胺环产物。
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Effect of reaction parameters such as temperature, propylene pressure, time, catalyst amount etc.
考察了反应温度、丙烯压力、催化剂用量、反应时间等反应参数的影响,找到了较佳的丙烯环氧化反应条件。
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The biosynthesis of the quinoid nucleus are the same in all coenzyme Qs. The biosynthesis of the isoprenoid side chain determine the kind of coenzyme Q.
芳香环的合成在所有的辅酶Q族物质中都是相同的,异戊烯基侧链的长度则决定了辅酶Q的种类,这里存在一个关键酶,即异戊烯焦磷酸合成酶。
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The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.
产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17);同时,将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛,异戊醛和环己醛)的不对称烯丙基化反应,并与广泛应用的Roush配体(22)和Brown配体(27)相比较,发现其立体选择性优于Roush配体,并接近Brown配体,但明显具有可回收利用的优势。
- 推荐网络例句
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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.
每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。
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Maybe they'll disappear into a pothole.
也许他们将在壶穴里消失
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But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.
但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。