烷基锌

The geometric structure, frontier orbital coefficients and frontier electron densities of the important lubricating oil additive Zinc dialkydithophosphate are investigated by using ab initio method.

采用量子化学从头算法，全优化计算了二烷基二硫代磷酸锌化合物的平衡几何构型和成键特徵，用前线轨道能级和组成以及前线电子密度等参数，探讨了ZDDP的润滑机理。

Therelationship of the amount of catalyst and the ee% of product was seen to be negative nonlin-ear. Catalyst 3 was used in the enantioselective addition of diethylzinc to aromatic aldehydesand gave good results. The configuration of products was determined by the configuration ofthe catalysts' chiral carbon linked with hydroxy group. Using β- amino alcohols bearing only one chiral center as catalysts for the enantiose-lective addition were studied. D-N, N-dialkyl-2-amino butanol gave poor catalytic effect be-cause of their structure. The configuration of the product is the same as the catalyst. Anotherkind of β- amino alcohols - phenylglycine derivatives and valine derivatives have chiralcenter on the carbon linked with amino group. Catalyzed by-phenylglycine derivatives 6,7, 9, 10, the reactions gave satisfied results. The optical yields exceeded 80%.

在探讨了含有两个手性中心的β-氨基醇之后，选择了只有一个手性中心的β-氨基醇，一是手性中心为连羟基的手性碳原子：D-N，N-二烷基-2-氨基丁醇；二是手性中心为连氨基的手性碳原子：D-苯基甘氨酸衍生物和L-缬氨酸衍生物。D-2-氨基丁醇的催化效果不太好，这与其结构的空间位阻较小有关系，反应产物与连羟基手性碳构型一致；由苯基甘氨酸和缬氨酸出发合成五种β-氨基醇6-10，研究了不同ee％的-6作用下的二乙基锌-苯甲醛加成反应，发现该催化剂具有不对称放大效应；-7，9，lO的催化效果也比较令人满意，光学产率80％以上，所得产物构型与催化剂构型一致。

Water, Sweet almond oil, Cetearyl wheat bran glycosides and cetearyl alcohol, Hydrogenated jojoba oil, Zinc oxide, Rosehip oil, Evening primrose oil, Macadamia nut oil, Calendula oil, Honey, Camellia oil, Rose geranium oil, Frankincense oil, Lavender oil, Grapefruit seed extract, Vitamin E,marshmallow root,ginkgo bilboa, Phenoxyethanol, Iodopropynyl butylcarbonate.

水，甜杏油，麦秸鲸蜡硬脂基葡糖苷和十六烷基醇，氢化霍霍巴油，氧化锌，野玫瑰果籽油，月见草油，澳洲坚果油，金盏菊油，蜂蜜，山茶油，老鹳草玫瑰油，乳香油，薰衣草油，药属葵根，百果树，苯氧乙醇，碘代丙炔基氨基甲酸丁

A similar initiator, Et_2Zn/-Sparteine, yielded polys with threo-diisotactic -rich structure in the main chain, indicative of strongly asymmetric inducation in this system. In this case, no polymeric complexes in-site formed because of the intensive coordination between sparteine and Zn ions.The binary initiating system composed of Et_2Zn and n-BuLi combined the advantages of both metal alkyls, which gave the polymers with higher molecular weights and moderate optical activity ~(25_D =-97.1°～+24.3°.

Et_2Zn／n-BuLi二元引发体系综合了两种金属烷基化物的优点，得到了分子量相对较高(M_n=1.4x10~3～4.9×10~3)且含有手性超分子结构的光学活性聚合物；聚合物中锌含量的微小变化可引起聚合物光学活性明显改变，超分子手性与聚合物侧基的绝对构型存在关联。

The results show that there is intensive synergistic effect among cetyltrimethylammonium bromide, benzalacetone and polyethylene glycol. A bright and compact nanocrystalline zinc was produced due to the coexistence of such three additives.

结果表明，十六烷基三甲基溴化铵、4-苯基-3-丁烯-2-酮和聚乙二醇三种添加剂之间具有较强的协同作用，采用三者组成的混合添加剂可制备出光亮致密的纳米晶锌镀层。

S-Naproxen was obtained by asymmetric cross-coupling reaction of 2-bromo- 6-methoxynaphthalene with organozinc reagent of ethyl α- bromopropionate, catalyzed by chiral β-aminoalkylphosphine-nickel complexes.

用β -氨基烷基膦的NiCl2 配合物为手性催化剂，以 6 -甲氧基- 2 -溴萘和α-溴代丙酸酯的有机锌试剂为原料，通过不对称交叉偶联反应合成S --萘普生。

Compostie effects between zinc dialkyldithiophosphate and succinimide in liquid paraffin were investigated, and the protecting films formed on iron surface by either of the two additives alone or their combination were studied with the aid of in situ dynamic temperature variation infrared spectroscopic technique.

研究了二烷基二硫代磷酸锌与丁二酰亚胺在液体石蜡中的复合效应，并对这2种添加剂单独使用或组合使用时在铁表面形成的保护膜进行了原位动态变温红外光谱分析，同时还与其它添加剂组合体系作了对比试验研究，探讨了二者产生复合效应的机理。

Zinc dialkyldithiophosphate succinimide friction reduction and antiwear performances synergistic effect adverse effect

中文关键词：二烷基二硫代磷酸锌，丁二酰亚胺，减摩抗磨性能，协同效应，对抗效应

In my work, mesoporous lamellar zincum sulfide is synthesized by hydrothermal techniques, with CTAB as templates and Zinc acetate and sulfourea as precursors. The best reactive condition is as follows: the ratio of reactive components is CTAB:Zinc acetate:sulfourea:water=1:3:10:1388; the volume of pH is 4.4; the best hydrothermal parameter is 100℃ for 48h.

以十六烷基三甲基溴化铵为模板剂合成层状介孔硫化锌的最佳反应条件为CTAB：Zn2：(NH2)CS：H2O=1：3：10：1388，pH值范围为3.8-5.8， 100℃下水热48h，此时得到的样品呈现一套层状介孔结构，相应的晶面间距为33.0 A，16.7 A，11.1 A。

Fine chemicals to add auxiliary Series: lubricating oil pour point depressant, calcium zinc magnesium methacrylate, methyl acrylic acid lauryl ester, tetradecane methacrylate ester, methacrylic acid octadecyl ester, a acid ethylene glycol, diethylene glycol methacrylic acid ester, glycidyl methacrylate, the second reduction of three ethylene glycol dimethyl acrylate, acrylic acid lauryl ester, tetradecyl acrylate, octadecyl acrylate, acrylic acid ethylene glycol, diethylene glycol acrylate esters, glycidyl, two shrink three acrylate such as ethylene glycol.

精细化工添加助剂系列：润滑油降凝剂，甲基丙烯酸钙锌镁，甲基丙烯酸月桂酯，甲基丙烯酸十四烷酯，甲基丙烯酸十八烷基酯，甲基丙烯酸乙二醇，甲基丙烯酸二乙二醇酯，甲基丙烯酸缩水甘油酯，二缩三乙二醇二甲基丙烯酸酯，丙烯酸月桂酯，丙烯酸十四酯，丙烯酸十八酯，丙烯酸乙二醇，丙烯酸二乙二醇酯，丙烯酸缩水甘油酯，二缩三乙二醇丙烯酸酯等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。