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- cyclization of olefines 烯烃环化
- Study progress on cyclization of citronellal to(-)-isopulegol over catalysts is reviewed. 综述催化香茅醛环化为(-)-异胡薄荷醇的催化剂研究进展.
- The phenomonon was explained in view of the mechanism of chemical cyclization of poly(amic acid). 从聚酰胺酸化学环化反应机理出发对这一结果给予了解释。
- Actually, expire the milk of ache slightly can be become the substitute of olefin, caky milk is classy olefin more. 其实，过期发酸的牛奶可当石蜡的替代品，凝固的牛奶更是上等的石蜡。
- Selective cyclization of the biscarbanion of 1,1 bis(2 t butylsulfnylethyl) dodecylphenylsulfone (1) under the different conditions was investigated. 比较 1;1 双 (2 叔丁基砜乙基 )十二烷基苯基砜 (1)双碳负离子在不同条件下的环合反应结果 .
- In the third step , dehydrating cyclization of 2-carboxyl-4'-ethoxylt riphenylamine result s in 3-ethoxyl-N-phenylacridone. 第三步2-羧基-4'-乙氧基三苯胺脱水环化生成了3-乙氧基-N-苯基吖啶酮。
- In this paper, a method for the determination of olefin of cracking gasoline by NIR is presented. 介绍了近红外光谱(NIR)分析技术在线测定催化汽油样品烯烃含量的方法。
- The study on intramolecular cyclization of polyisoprene is reviewed and dissussed. The trend of the cyclization of polyisoprene is suggested. 本文对目前聚异戊二烯环化反应的研究作了概述与讨论,提出了聚异戊二烯环化反应研究的方向。
- Hydroaminomethylation of olefin is an efficient method for the synthesis of various amines. 烯烃的氢氨甲基化反应是合成各种胺及其衍生物的有效途径。
- PAO can be obtained by mixing two kinds of olefines which have different average carbon in proportion with variance analysis. 充分了解到裂解烯烃的平均碳数分布对产品的粘度指数和凝点的显著性影响。
- Using absolute alcohol as solvent,under the effect of NaOH,the 3,3-dibromomethyl oxetane (BBMO) was synthesized by the cyclization of 1,1,1-tribromomethly-1-hydroxymethyl methane. 以1,1,1-三溴甲基-1-羟甲基甲烷为原料,无水乙醇为溶剂,在NaOH的作用下经关环反应合成了3,3-二溴甲基氧丁环(BBMO)。
- This paper presents applications of andes insynthesis of heterocyclic compounds.They include cyclization of azides, cycloaddition of andes, ringexpansions and contractions. 利用叠氨化合物合成杂环化合物的新方法，包括环化、环加成、扩环和缩环反应。
- Besides, the development trend on carbonylation of olefin to low-carbon aldehyde was pointed out. 并比较丙醛生产工艺与丁醛的相似之处，从而指出丙醛工艺的发展趋势。
- In another direction, the radical cyclization of thioimide with acylsilane produced simple cyclization product in low yield without expected enol silyl ether compound. 对于硫醯亚胺与矽基酮的自由基反应，则是得到低产率的简单环化产物，而不是预期的烯醇矽醚化合物。
- Recent research indicates that adding another kind of olefin monomer into the ethylene-propylene-diene system will obtain a new type of EPR with special properties. 近期研究表明,在乙烯-丙烯-二烯基础上再引入另一种烯烃单体参加共聚合反应,可合成性能更具有专门化的四元乙丙橡胶。
- Recently,in the field of olefin polymerization people pay more attention to the functionalization of polyolefins based on its good properties. 在烯烃聚合中，聚烯烃的功能化是受到人们普遍关注的问题之一。
- A detailed study by means of quantum mechanics CNDO/S on the UV spectrum of olefin hydrocarbon homologous compound has been made. 应用量子力学CNDO/S方法对烯烃同系物紫外光谱进行研究，算出了各分子轨道的能量及相应紫外光谱吸收峰的理论位置。
- How can I persuade you of my sincerity? 我如何能够让你相信我的诚意？
- There is a vein of melancholy in his character. 他的性格中有少许忧郁的气质。
- The article also talks about the present situation of olefin polymerizing technology in our country, and gives some advice on our future development. 同时也介绍了我国聚烯烃工业的现状,并提出了我们迎接挑战把握机遇所应采取的对策。
