配基

E. value of productions were detected by high performance liquid chromatography. Results The chiral aminoalcohol ligand compound Ⅰ can promote the asymmetric allylation of acylhydrazones and the yield was 57%; The highest values of e. e. obtained for this reaction was 22%.

结果 手性氨基醇配体化合物Ⅰ能够促进烯丙基三氯硅烷和酰腙的烯丙基化加成反应，在它的辅助作用下，烯丙基化加成产物的产率可达到57%，对映体过量值最高达到22%。

Inthis papor,we synthesize and symbolize three sulphide bicarboxylate ligands such as 2.5-bis-1.3,4-thiadiazole;2,2 -(o-phenylenedimethylenethio) diacetic acid(L11); 2,2 -(m-phenylenedimethylenethio) diacetic acid.

本文合成和表征了2，2′-(1，3，4-噻二唑-2，5-二硫基)二乙酸、2，2′-邻苯二甲硫基二乙酸和2，2′-间苯二甲硫基二乙酸三个含硫二元羧酸配体。

As compared to isop, the coexistence of electron-donating -OH,-C(CH_3_3 or electron-withdrawing groups (-NO_2) groups in the dicarboxylate derivatives has a significant effect on the molecular self-assembly.

同间苯二甲酸相比较，含有取代基的5-羟基间苯二甲酸、5-硝基间苯二甲酸和5-叔丁基间苯二甲酸在一定程度上影响着配位聚合物的自组装。

This section includes the nonindustrial preparation, purication, and reactions of inoganic substances:elements; inorganic acids, bases, and salts; synthetic minerals; inclusion compounds;charge-transfer complexes; coordination compounds containing inoganic and organic ligands;nonmetal and metalloid compounds; and carbon-containing compounds such as the carbon oxides, metal carbonyls, carbonates and transition metal carbonxylates.

这一章节涵盖了无机物的非工业制备、提纯、及反应：元素；无机酸、基团和盐类；合成矿物质；包藏复合物；转移电荷复合物；包含了无机和有机配合基的配位化合物；非金属与非金属化合物；以及含碳化合物，如碳氧化物、金属羰基、碳酸盐和含有羰基的过渡金属等。

N -(4-vinyl)benzylimidazole and its copolymer with octyl methacrylatewere synthesized and characterized,and oxygen—binding properties of cabaltporphyrincomplexes with imdazole ligands were studied.

研究了 N -(4-乙烯基)苄基咪唑单体及其与甲基丙烯酸辛酯共聚物的合成与表征，以及咪唑基有机或聚合物配位体与钴卟啉络合物的氧结合性能。

Through condensing o-aminobenzoic acid, ethyl oxalyl chloride and ethylenediamine(or 1,2-propylenediamine), two new ligands N-benzoato-N′-(2- aminoethyl)oxamido(H3oxbe) and N-benzoato-N-(2-amino-2-methylethyl)oxamido(H3oxbt) have been synthesized. Their mononuclear complexes Na·1.5H2O and Na·1.5H2O have also been obtained.

2以邻氨基苯甲酸、草酸乙酯酰氯和乙二胺(或1，2-丙二胺)缩合制得了两种具有不对称草酰胺结构配体N-(2-苯甲酰基)-N&-(2-氨乙基)草酰胺(H3oxbe)和N-(2-苯甲酰基)-N&-(2-氨丙基)草酰胺(H3oxbt)，并得到了它们的单核配合物：Na·1.5H2O和Na·1.5H2O。

At first,the amino group of amino acid esters interacts with the carboxyl group of the amino acid residue of this porphyrinatozinc to form 1:1 adducts.

氨基酸酯的氨基首先与氨基酸残基的羧基作用形成1：1的加合物，然后与锌卟啉的中央锌原子配位形成1：2的加合物，客体分子与主体分子上的氨基酸残基之间的排斥作用以及主客体之间的色散力作用是主体分子能识别客体分子的另外两种作用。

The process includes the following steps: dissolving bromine in halogenated hydrocarbon, dropping the bromine solution into reactant system comprising pentabromo toluene, halogenated hydrocarbon, free radical initiator and hydrogen peroxide at 50-65 deg.c, and heating to 60-78 deg.c for reflux reaction until the reactant system becomes transparent; filtering the resultant to obtain solid product, washing with carbon tetrachloride and water separately and vacuum drying to obtain pentabromo benzyl bromide.

具体步骤为：将五溴甲苯、卤代烃、自由基引发剂和过氧化氢组成的反应体系加入到三颈瓶中，将0.07～0.1mol的溴溶于50ml卤代烃配成溶液，在50-65℃温度下滴加到反应体系中，滴加时间为50-70分钟，然后升温至60-78℃温度下回流反应，至反应体系逐渐变透明，且不再产生气泡时，将所得产物过滤，得到固体产物，分别用CCl 4 和水洗涤，真空干燥，即得到五溴苄基溴；其中，五溴甲苯与溴的摩尔比为1∶0.7-1∶1.0，溴与过氧化氢的摩尔比为1∶1.0-1∶1.4，自由基引发剂加入量为五溴甲苯重量的1-10％，卤代烃的加入量为反应体系体积的40％-100％，所用溶剂可以直接进行下一批反应，不需要更换溶剂或蒸馏提纯。

Specific inhibition of Hh signalling using small molecule inhibitors, a neutralizing anti-Hh antibody or genetic deletion of smoothened in the mouse stroma results in growth inhibition in xenograft tumour models.

由癌细胞分泌的Hedgehog配体，在肿瘤表皮细胞中未能激活信号作用，而是在&基质&上发挥作用（&基质&由细胞外基质、成纤维细胞、内皮细胞和微血管组成，恶性细胞着床于其中）。

The structures were studied by IR and NMR. The absorption frequencies of the carbonyl group markedly depended on the coordination no. of the tin atom. The chem. shifts of 119Sn and 13C and the 1J(119Sn-13Sn) coupling constants of the compounds were determine Small structural changes around the tin atom were reflected in the 119Sn chem. shifts. For tributyltin arylcarboxylates, a relationship between 119Sn chem. shifts and Hammett constants of the para-substituents was found. The biol. activities of same compounds have been studied. They may be used as fungicides for fruit.

通过对它们的红外光谱、核磁共振谱(^1^3C， ^1^1^9Sn)的研究，表明羰基红外吸收频率与锡原子的配位数有密切关系，同样分子上的微小变化明显地表现在δ119Sn上，对位取代基苯甲酸酯的δ119Sn与苯环上取代基的Hammett常数之间存在良好的线性关系：δ119Sn=19.11σ+110.612 n=7，γ=0.9955着重研究了部分化合物在经济作物上的抗病原菌能力，结果表明，这是一类具有广谱性的有机锡化合物，抗菌活性优于对比药剂朴海因，接近或相当于多菌灵，它们同时具有较强的除草活性。

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。