链烯

Furthermore, the selective reductions of 2,2'-dinitrobiphenyl have been detailedstudied in the synthesis of achiral biphenyl backbones.

运用不对称活化的策略，成功地在Cu催化Et_2Zn对链烯酮的1，4-共轭加成反应中获得了高对映体选择性的加成产物。

Then the calculation of quantum chemistry has been carried ...

结果表明这两种化合物均具有较好的配位能力，且以链烯醇式构型最稳定。

The method comprises melt extruding a mixture comprising a polyester and one or more alkyl metal sulfonates where the metal is Na, Li or K and the alkyl is straight or branched chain alkyl of 12 to 15 carbon atoms, or is straight or branched chain alkenyl of 12 to 18 carbon atoms.

方法包括将包括聚酯和一种或多种烷基金属磺酸盐的混合物熔体挤出，其中金属是Na、Li或K和烷基是12-15个碳原子的直链或支链烷基，或是12-18个碳原子的直链或支链链烯基。

Also useful are oil-soluble copper dithiocarbamates of the general formula Rc RdzCu, where z is 1 or 2, and Rc and Rd are the same or different hydrocarbyl radicals containing from 1 to 18, and preferably 2 to 12, carbon atoms, and including radical s such, for example, as alkyl, alkenyl, aryl, aralkyl, alkaryl and cycloaliphatic radicals.

通用化学式为RcRdzCu的油溶性二硫代氨基甲酸铜，也非常有用。式中，z为1或2，Rc和Rd是含有1到18个碳原子（最好含有2-12个碳原子）的相同或不同的烃基根，并且包括烷基、链烯基、芳基、芳烷基、烷芳基和环脂基等。

Amino-2-methylpropanol was used as the chemical modifying reagent of fatty acids to modify the carboxyl group into nitrogen-containing heterocycle which would effectively prevent the migration of carbon double bonds of the alkenyl in the electron impact source.

以2-氨基－2-甲基－丙醇为脂肪酸的化学修饰试剂，气相色谱－电子轰击质谱分析葵子油脂肪酸。2-氨基－2-甲基－丙醇将脂肪酸羧基修改为含氮杂环，使在EI源中避免了链烯基中碳碳双键的移动。

Amino-2-methylpropanol was utilized as a chemical modifying reagent to modify carboxyl groups in unsaturated fatty acids into nitrogen-containing heterocycles, which effectively suppressed the migration of double bonds of the alkenyl within the electron impact source and led to regular informative mass spectra indicative of the position of the olefinic bonds in the chain.

以2-氨基－2-甲基丙醇为脂肪酸的化学修饰试剂，将不饱和脂肪酸羧基化学修饰试剂，将不饱合脂肪酸羧基化学修饰成含氮杂环，从而避免了链烯基中碳碳双键在EI源中的移动，并使质谱呈现显示双键位置的规范信息。

The present invention relates to sulphonyloxazolamines of general formula, wherein R, R represent independently from each other H, A,-(CH2)n-Ar or alkenyl with 2-6 C atoms, R and R together also represent a mononuclear saturated heterocycle with 1-2 N, O and/or S atoms, Z is H, A, CF3, NO2, Hal, OH, OA, NH2, NHA or NA2, A represents alkyl with 1-6 C atoms, Ar is Z-monosubstituted or Z-disubstituted phenyl, halogen is F, Cl, Br or I, n is 1 or 2 or the physiologically acceptable salts or solvates thereof.

本发明涉及式磺酰基∴唑胺或其生理上可接受的盐或溶剂化物，其中R 1 ，R 2 每一个相互独立为H、A、－(CH 2 )n－Ar或具有2到6个C原子的链烯基，R 1 和R 2 也一起为具有1到2个N、O和/或S原子的单核饱和杂环，Z为H、A、CF 3 、NO 2 、卤素、OH、OA、NH 2 。NHA或NA 2 ，A为具有1到6个C原子的烷基，Ar为被Z取代的或Z二－取代的苯基，卤素为F、Cl、Br或I，n为1或2。

The present invention relates to compounds of formula wherein R is hydrogen, lower alkyl, lower alkoxy, halogen or lower alkyl substituted by halogen; R is hydrogen or halogen; or R and R are together with the carbon atom to which they are attached -CH=CH-CH=CH-; R is hydrogen, lower alkyl, phenyl optionally substituted by halogen, or is hetaryl, optionally substituted by lower alkyl; R is hydrogen, lower alkyl, phenyl, benzyl, lower alkenyl, lower alkoxy, phenyloxy, benzyloxy, S-lower alkyl, halogen, CN, lower alkyl substituted by halogen or O-lower alkyl substituted by halogen; R is hydrogen or lower alkyl, aryl is phenyl or naphthyl; n is 1, 2 or 3; m is 1 or 2; and pharmaceutically acceptable acid addition salts and tautomeric forms thereof.

本发明涉及式化合物及其可药用的酸加成盐和互变异构形式，其中R 1 是氢、低级烷基、低级烷氧基、卤素或被卤素取代的低级烷基；R是氢或卤素；或R 1 和R与它们连接的碳原子一起是-CH＝CH-CH＝CH-；R 2 是氢、低级烷基、任选被卤素取代的苯基或者是任选被低级烷基取代的杂芳基；R 3 是氢、低级烷基、苯基、苄基、低级链烯基、低级烷氧基、苯氧基、苄氧基、S-低级烷基、卤素、CN、被卤素取代的低级烷基或被卤素取代的O-低级烷基；R 4 是氢或低级烷基，芳基是苯基或萘基；n是1、2或3；m是1或2。

Long-chain branched polyethylene was obtained using a homogeneous bianary catalyst system composed of late and early transition metal complexes,namely a mixture of bis(α-naphthalidine)-2,3-butanediimine NiBr2 and Cp* TiCl3,as catalyst precursors in the presence of MAO.

合成了一种后过渡金属镍化合物 [二- N ，N′--2 ，3-丁二亚胺镍二溴化物 ][C10H7—NC(CH3)C(CH3)N—C10H7]NiBr2，此化合物在MAO活化下催化乙烯聚合能得到含有末端双键的低分子量聚乙烯，即长链α-烯烃。

The characterization of the coked catalyst shows that the deactivation of catalysts is caused by a jam of bulkier molecules, which are the alkylbenzenes from both reactants and products, so the deactivation cannot be avoided.

苯与长链烯烃的烷基化反应过程中，β沸石催化剂的失活是由于产品直链烷基苯本身和原料中带入的杂质芳烃逐渐堵塞孔道、阻止了反应物分子接近活性中心引起的，是由晶内开始逐渐向外发展的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。