取代物

With the increasing of the concentration of alkali, the content of insolubility of the product reduces initially but increases later, the DS of product increases initially then reduces later. The product has good solubility and high DS at 10% content of alkali. The insoluble product reduces at initially and then keeps stability later with the time of basification extending. With the increasing of the content of water in system, theinsolubility of the product reduces initially and then increases later.

随着碱浓度的增加，产物中水不溶物含量先降低后增加，取代度先上升后下降，在10％时，水溶性最好，取代度最高；延长碱化时间，产物中水不溶物含量下降，之后趋于稳定；提高反应体系中水的含量，产物中水不溶物含量先降低后增加，在7％时，水溶性最好，延长分散时间，产物中水不溶物含量下降，取代度提高；醚化剂以少量多次的方式滴加，产物水溶性好。

The UV-Visible absorption spectra and the fluorescence emission spectra of sixteen tetra-substituted metallo-phthalocyanine complexes {R4PcM, where R=2-［4-(2-sulfonic ethyl)piperazin-1-］ ethoxyl, 2-(piperidin-1-yl)ethoxyl; substitution position at α-position and β-position of phthalocyanine ring; M=Zn, Ni, Coand Cu} were measured.

报道了16种含哌嗪或含哌啶四取代酞菁金属配合物{R4PcM， R=2-［4-(2-磺基乙基)哌嗪-1-基］乙氧基、 2-(哌啶-1-基)乙氧基；取代位置分别在α位和β位； M=Zn， Ni， Co， Cu}的UV-Vis吸收光谱和荧光发射光谱的测定，探讨了中心金属离子、取代基种类及其取代位置、溶剂等因素对酞菁金属配合物UV-Vis吸收光谱和荧光发射光谱性质的影响。

The B3LYP/6-31G calculations on the four complexes show that the largest interaction energy is-13.98 kJmol^(-1) in the complex composed of HMX and hexaazacalix [3]-p-triarene [3]-2-amido-1, 3, 5-triazine. Results show that intermolecular interaction energies of azacalix [6] arenes with substituted groups are stronger than that without substituted groups, and intermolecular interaction energies of azacalix [6] arenes with amido groups are stronger than that with nitryl groups.

研究发现分子间相互作用能最大的复合物是六氮杂杯[3]-对－三芳烃[3]-2-氨基－1，3，5-三嗪与HMX所形成的复合物，最大相互作用能为－13.98 kJmol^(-1)；而且带有取代基的复合物的相互作用能大于没有带取代基的复合物，带有氨基取代基的复合物的相互作用能大于带有硝基取代基的复合物。

The reactions of several phenols and 2, 2, 6, 6-tetramethyl-4-substituted piperidine oxoammonium salt have been studied. It was found that these oxoammonium salts are new facile reagents for phenolic coupling.

应用2，2，6，6-四甲基哌啶氧铵盐实现了酚类的氧化偶联反应：对位取代的酚类底物得到邻位-邻位偶联产物；2，6-二取代的酚类底物得到对位-对位偶联产物；2，4，6-三取代的阻碍酚类底物得到苄位氧化偶联产物。

This paper contains three parts: 1 Synthesis of novel titanium complexes; 2 Polymerization behaviors of alkoxyl substituted Cp Titanocenes as catalysts for styrene syndiotactic polymerization; 3 Polymerization behaviors of alkenyl substituted Cp Lanthanocenes as Methyl Methacrylate polymerization catalysts.

中文题名新型茂钛、噁唑啉钛络合物的合成、表征以及茂钛、茂稀土络合物催化性能的研究副题名外文题名 Synthesis，characterization of novel Cp，oxazoline titanium complexes and polymerization behaviors of titanocenes and lanthanocenes 论文作者张浩导师钱延龙黄吉玲学科专业应用化学研究领域\研究方向金属有机与均相催化学位级别博士学位授予单位华东理工大学学位授予日期2003 论文页码总数148页关键词金属有机化学稀土络合物噁唑啉类钛络合物茂钛络合物馆藏号BSLW /2003 /O627 /27 本论文包括三部分内容：1）有机金属钛络合物的合成；2）烷氧基取代茂钛络合物催化苯乙烯间规聚合的研究；3）烯基取代茂稀土络合物催化甲基丙烯酸甲酯聚合的研究。

The combined acids , LHZZS,XDZZS and SLZZS, one of four fractions in montan resins from montan waxes from Liaohu, Xundian and Shulan brown coal respectively, were derived by CH 2N 2 to methyl esters and their chemical constituents and structural characteristic were studied on GC-MS.

结果显示，树脂结合酸均以正构烷酸为主要成份，其分布为C1 2 ～C2 8，高含量的正构烷酸集中在低碳数一端，C2 0 含量最高，其次为C1 6 ，而舒兰结合酸中，正构烷酸占绝对优势，且C1 6 为最高含量的化合物；去氢松香酸在每一个样品中含量较低，其它三环二萜酸，如松脂酸、三达松脂酸等异构体或立体异构体含量也非常低；具有五环三萜骨架的酸性物质，在潦浒、舒兰结合酸中比较丰富，其含量超过寻甸结合酸；在低碳数一端，存在着各种支链烷酸及苯甲酸、苯酚及取代物。

The transition state theory approach to cis-trans isomerization in substituted disilenes is presented.

本文介绍了过渡态理论对双键取代物顺反异构化过程的处理方法。

The main constituents of this oil were aldehydes(31.15%),terpene and their oxide(20.66%),alkyls(8.35%),Furan heterocyclic compounds(6.41%),non terpene alcohol(4.26%).

知母挥发油的化学成分主要为：醛类(31.15%)、萜类及其氧化物(20.66%)、烷烃及其含氧取代物(8.35%)、呋喃杂环化合物(6.41%)、非萜醇类(4.26%)。

Baptism for the dead, vicarious baptism or proxy baptism is a religious practice of baptising a living person on behalf of an individual who is dead; the living person is acting as the deceased person's proxy.

对死者的洗礼，称代替受洗或者代理受洗，是生者代表死者接受洗礼的一种宗教习俗；生者就饰演死者的取代物。

Seventeen resins were selected to compare their performances in adsorbing and desorbing monosubstituent in the mixture. Experimental results showed that HZ-841 resin possessed higher selectivity and desorption capacity.

比较了17种树脂对β-环糊精单甲苯磺酰化产物的吸附特性，确定了大孔弱极性吸附树脂HZ-841对单取代物具有较高的吸附选择性和良好的脱附性能。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。