加合物

During the reaction of alkylation, general contained 0.2%~2.0% butadiene will produce viscous heavy composite materials, which will raise final boiling point of alkylate and decrease octane, what is more, it will react with acid to produce corresponding ester, which will increase the consumption of acid, Therefore, we must remove butadiene by selective hydrogenation, at the same time, it will convert some of 1- butane to 2- butane by isomerization and raise octane of alkylate.

一般含有0.2%~2.0%的丁二烯，其在烷基化反应中，可生成一种分子量很高的粘稠重质迭合物，使烷基化油的干点升高，辛烷值降低，并且它还和酸反应生成相应的酯而加大酸耗量。因此必须经过选择性加氢除掉丁二烯，同时，将部分1-丁烯异构化为2-丁烯，以提高烷基化油的辛烷值。

In the improved process, the stand time of the colored complex is prolonged, measurement can be done between 20 min to 2h after colorization.

改进方法中形成的硅钼蓝络合物稳定时间长，可在显色后 2 0min到 2h之内进行测定，3个样品平行测定的相对偏差仅为 3 %，加标回收率为 95 %～ 10 3 %，最大相对误差为 5 0 %。

The calculated results suggest that the ethynyl ...

计算结果表明，反应物中自由基C2 H中的边端C进攻O2 形成了中间体 1 ，中间体 1是一个加合产物。

Methods In view of the selective accumulation of porphyrin derivatives in tumor tissue, three ftorafur-porphyrin compounds and three metal compounds were designed, and the target compounds were synthesized with satisfied yield via a four-step procedure starting from pyrrol and substituted benzaldehydes.

根据卟啉对肿瘤组织的选择性滞留作用，设计了3个卟啉替加氟化合物及3个金属络合物，并以吡咯和取代苯甲醛为原料经4步反应以满意的收率得到目标化合物。

However, there is no difference for NAT2 rapid and slow acetylator between two groups.

吃红烧鱼因素在NAT2的快速酶中，特别是在野生纯合型中直肠腺瘤复发的相对危险度有增高趋势，提示了NAT2〓4等位基因编码快酶型NAT，可能在红烧鱼产生的杂环胺类化合物中代谢中加速其N-乙酰基化代谢过程，从而加速其代谢为终致癌物而与肠粘膜上皮细胞的DNA产生加成物，损伤其遗传物质。

A highly regio- and stereoselective diboration of allenes was achieved with a catalytic amount of phosphine-free Pd complex and alkenyl or aryl iodide.

双硼试剂加成到1，2双烯的反应，传统上利用Pt金属错合物为催化剂，根据文献的报导，单独只使用Pd金属错合物是无法进行此反应的。

But under the same conditions, the reactions of the complex (41) with organic lithium reagents give a kind of novel complexes in which the nucleophile is added to the a-carbon of the phthalazine ring.

然而含有桥羰基的2，3-二氮杂萘配位的羰基双铁络合物4l在相同的条件下与芳基锂试剂反应时，芳基锂却是亲核加成在氮杂环的α位羰上，生成一类结构独特的双氮双铁羰基络合物。

The intermediates 2a～2f of cyclic (1-arylseleno)glycerol phosphate and tegafur conjugates were synthesized by one-pot reaction of hexaethyl phosphorous triamide, activated by a catalytic amount of iodine, with (N3-tegafur)alkanol, 1-arylselenoglycerol and sulphur successively in refluxing benzene.

以碘作催化剂，无水苯为溶剂，六乙基亚磷酰三胺依次与羟乙基替加氟、1-芳硒基甘油及硫反应，得中间体硒代环甘油磷脂替加氟缀合物2a～2f。

According to Johnson's Rule and IR spectra, their possible structures are suggested. The bonding parameters of those complexes are calculated by ESR parameters. And the crystal field parameters are calculated by using electronic spectral data. It can be seen that the vanadyl complexes in the solution are ionic complexes and that the α〓 values of those complexes decrease following the increasing of the N donor replacing the O donor of water on the equatorial plane in those complexes. This means that the covalent bonding between vanadium and ligand increases as Ser, Phen or Bipy replace water ligands. The results show the competitive coordinate law that the coordination reactivity of Phen and Bipy is much stronger than that of Ser. The simulation program of ESR is compiled by the theory of ESR in the present work.

测定了VO-丝氨酸二元体系、VO-丝氨酸-邻菲咯啉三元体系和VO-丝氨酸联吡啶三元体系在不同酸度下（pH=1.0～14.0）的乙二醇／水（V／V=1：1）溶液低温ESR谱，发现不同pH下，溶液中具有不同组成的配合物，根据不同pH下ESR谱的变化，利用Johnson的加合规则并结合红外光谱，推测了它们在溶液中的可能结构；利用波谱参数计算了配合物键参数；利用电子光谱数据计算了配合物的晶体场参数，讨沦了它们的成配特性，结果表明：VO配合物属离子型配合物，随取代水分子的配体（Ser、Phen或Bipy）数目增加，键参数减小，配合物共价性增强，同时得出这些体系中，生物配体竞争配位规律：Phen和Bipy与VO的配位能力比Ser强。

Thus. Treatment of CR1R2=C=CH2 (R1 = R2 = Me; R1 = H, R2 = n-Bu; R2 = Ph; R2 = cyclohexyl; R2 = cyclopentyl, R2 = C6H5O, R2 = 2-IC6H4O, R2 = 4-IC6H4O) with bisdiborn in the presence of Pd2 (5 mol %) and 3-iodo-2-methyl-2-cyclohexen-1-one (5 mol %) in toluene at 80 oC gave products bearing both vinylic and allylic boron moieties in good to excellent yields.

但我们发现可以使用Pd金属错合物与有机碘化物共同催化下的系统，来进行此种加成反应。溶剂的选择以甲苯为最佳，Pd错合物以没有强配位基存在为最好的选择。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。