三烯

The photocycloaddition of 1-naphthonitrile (1-NpCN) and 2,3-dimethyl-2-butene in cyclohexane or benzene gave cyclobutane 3 primarily,but that of 2-NpCN gave azetine 6 asthe major and cyclobutane 5 as the minor product in low conversion photolysis.

在低转化光解情况下，1-萘甲腈(1-NpCN)和2，3-二甲基丁烯-2在环已烷或苯中的光环加成反应主要得到环丁烷3，但2-NpCN主要得到氮杂环丁烯6和少量的环丁烷5，三氟醋酸量增加抑制1-NpCN和DMB的光环加成反应，表明TFA与基态及单激发态1-NpCN生成非光反应的复合物，它也淬灭(1-NpCN-DMB)激基复合物。

The photocycloaddn. of 1-naphthonitrile (1-NpCN) and 2,3-dimethyl-2-butene in cyclohexane or benzene gave cyclobutane I primarily, but that of 2-NpCN gave azetine II as the major and cyclobutane III as the minor product in low conversion photolysis. The photocycloaddn. of 1-NpCN with DMB is retarded by increasing amts. of trifluoroacetic acid which is shown to form non-photoreactive complexes with ground state as well as with singlet excited state 1-NpCN. It also quenches the *(1-NpCN-DMB) exciplex.

在低转光解情况下，1-萘甲腈(1-NpCN)和2，3-二甲基丁烯-2在环已烷或苯中的光环加成反应主要得到环丁烷3，但2-NpCN主要得到氨杂环丁烯6和少量的环丁烷5，三氟醋酸量增加抑制1-NpCN和DMB的光环加成反应，表明TFA与基态及单激发态1-NpCN生成非光反应的复合物，它也淬灭^*(1-NpCN-DMB)激基复合物。

The third part of this thesis is reactive simulating calculation In this section, some well-known auxiliaries are selected to compute in density functional theory B3LYP on Gaussian 03, from which the relationship between reaction active energies of transition states and enantiomeric excess of chiral products homoallylic alcohols isobtained based on relative reactive ratio theory. Using this relationship, calculations on the reaction of more than eight auxiliaries with four other aldehydes are carried out in AMI and MNDO, proving that N,N\'-dibenzyl tartamide has higher enantioselectivity than others in this reaction.

第三部分为计算化学部分，运用密度泛函理论B3LYP方法在Gaussian03软件上对已经报道的几种手性配体参与的醛不对称烯丙基化反应过程进行模拟计算，基于相对反应速率理论找出两种构型过渡态间活化能的差异与产物光学收率之间的关系；并以此为基础，用AM1和MNDO方法对上述合成的几种配体控制的反应过程进行量化计算，从而在理论上证实了N-苄基酒石酸二酰胺配体在醛的不对称烯丙基化反应中具有较高的立体选择性。

The polymerization reacts from the inverse emulsion . Selecting white oil as continuous medium , Span60 and TX-10 as the complex emulsifier , AM-01﹑(NH4)2S2O4 and NaHSO3 as new-type complex initiator , the copolymerization of dimethylamino ethyl acrylate methyl chloride/acrylamide was developed . The effects of the concentration of monomer﹑emulsifier and initiator﹑ temperature﹑reaction time and pH on the molecular weight﹑intrinsic viscostity﹑conversion ratio and cation degree of copolymer were studied .

以反相乳液为初始聚合体系，油酸失水山梨醇酯Span60和辛基酚聚氧乙烯醚TX-10构成复配乳化剂，白油为连续介质，AM-01、过硫酸铵和亚硫酸氢钠组成新型复合引发体系，进行丙烯酰胺/（2-甲基丙烯酰氧乙基）三甲基氯化铵的反相准微乳液共聚合，研究了单体浓度、乳化剂、反应温度、反应时间、pH等因素对聚合产品分子量、特性粘数、转化率及阳离子度的影响。

Methodologies for stereoselective synthesis of alkenes are of great interest in synthetic organic chemistry since many biologically active compounds occuring in nature possess the structural skeleton of disubstituted or trisubstituted alkenes.

烯烃的立体选择合成方法学研究是有机合成化学中的重要课题，因为许多重要的天然产物中均含有双取代或三取代烯烃的结构单元。

The result indicated that the cellular fatty acid compositions of Salmonella, Escherichia coli, Vibrio and Shigella all contain tetradecanoic acid, hexadecanoic acid and octadecenoic acid, the total content is around 90%, in which the hexadecanoic acid is the most, above 40%, next is the octadecenoic acid, around 30%.

结果表明：沙门氏菌属、埃希氏菌属、弧菌属和志贺氏菌属全细胞脂肪酸组分都含有十四烷酸、十六烷酸和十八碳烯酸，这三种脂肪酸占总脂肪酸含量的90%左右，含量最高的是十六烷酸，含量在40%以上，其次是十八碳烯酸，含量在30%左右。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我们也发现碘能够有效地催化N-芳基亚胺与烯醇醚的Diels-Alder反应，以很高的化学收率得到了四氢喹啉衍生物，并且发现碘也能够直接催化芳香醛、苯胺、烯醇醚的三组分&一锅&反应，获得的化学产率与使用预制的N-芳基亚胺相当。

The graft copolymerization of acryalmide and methyl acrylacyl oxyethyl trimethyl ammonium chloride onto chitosan under microwave radiation was studied. The effect of synthesis conditions on graft ratio and graft efficiency, on the strengthening efficacy of the product for wheat straw pulp was studied.

摘 要：研究了用微波辐射的方法进行壳聚糖和丙烯酰胺及甲基丙烯酰氧乙基三甲基氯化铵的接枝共聚反应，讨论了反应条件与产物的接枝效果对麦草浆的增强作用的影响。

Several aminated Fullerene derivatives were synthesized by the reaction of C〓 with phenylamine, diphenylamine and triethylamine etc., the phenomena of fragmentation and aggregation of the aminated Fullerene derivatives in UV laser desorption ionization mass spectrometer was observed, a few nitrogenous poly-Fullerene ions, such as C〓NH, C〓N〓H〓, C〓N〓H〓, C〓N〓H〓, C〓N〓H〓 etc.

对C〓富勒烯与苯胺、二苯胺、三乙胺等形成的加合物在紫外激光解吸电离作用下可以发生不同寻常的裂解和聚合现象进行了研究，认为其形成机理为：上述加合物在紫外激光解吸电离作用下，发生裂解产生C〓NH、C〓N及C〓等离子，然后它们之间发生聚合，形成如：C〓NH、C〓N〓H〓、C〓N〓H〓、C〓N〓H〓、C〓N〓H〓等含氮原子的聚富勒烯离子。

Pyridazine was prepared by hydrogenolysis of 3,6-dichloro pyridazine obtained via chlorination of 3,6- pyridazine diol with phosphorus oxychloride.

以顺丁烯二酸酐与盐酸肼为原料经缩合成环反应生成顺丁烯二酰肼，再用三氯氧磷氯化合成3，6-二氯哒嗪，最后经催化加氢制得标题化合物哒嗪。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。