查询词典 iodides

In the presence of palladium catalyst and triphenylphosphine, alkynyl Grignards or alkynyllithiums could successfully couple with alkyl bromides and iodides. Aryl-substituted propargylic dithioacetals could also be obtained by this strategy.

在钯触媒和三苯基磷的存在下，我们可利用炔基格林那试剂或炔基锂和简单的卤烷进行偶合，而这样的反应条件也能应用在苯基取代炔丙基硫缩酮衍生物的合成上。

Reaction of pyrazine ( 1a ), pyrimidine ( 1b ), and pyridazine ( 1c ) N -oxides with a variety of aryl bromides, chlorides, and iodides occur in good yields.

反应吡嗪(1A )款嘧啶(2)、氮哒-氧化物与各种芳溴化物、氯化物、碘化物发生良好收益。

Under these conditions several aryl iodides bearing a wide range of functional groups were converted into the corresponding aryl azides in good yields.

在重新优化后的条件下，大部分不活泼芳基溴化物可以与叠氮化钠发生交叉偶联反应得到良好收率的芳基叠氮化合物，但是有拉电子基团取代的芳基溴化物与叠氮化钠的偶联反应则难以进行。

Under these conditions several aryl iodides bearing awide range of functional groups were converted into the corresponding aryl azides in good yields.

在重新优化后的条件下，大部分不活泼芳基溴化物可以与叠氮化钠发生交叉偶联反应得到良好收率的芳基叠氮化储蓄型投资银条合物，但是有拉电子基团取代的芳基溴化物与叠氮化钠的偶联反应则难以进行。

They are called the chlorides, bromides iodides or fluorides.

它们称为氯化物、溴化物、碘化物或氟化物。

That is mean, weak acids tend to have lower milk/plasma concentration ratios and higher concentrations in milk, such as anticoagulants, antimetabolites, antithyroid agents, atropine, bromides, cathartics, ergot, iodides, mercurials, metronidazole, narcotics, and radioactive agents.

乳汁中药物浓度大部分较母体循环中药物浓度低，例如哺乳期妇女服用红霉素、磺胺类、异烟肼、甲硝唑，乳汁中各药物浓度约为血清中该药物浓度的50%，而青霉素、头孢菌素在乳汁中的浓度仅不足血清中该药物浓度25%。

Its sources and compounds are usually iodides; iodates and periodates also occur.

其来源和化合物通常都是碘化物，也有碘盐和高碘酸盐。

For inorganic or organic iodides with different molecular sizes and molecular iodine said adsorbent has high adsorption action, and its strength is high.

对不同分子尺寸的无机与有机碘化物以及分子碘，该载银大孔沸石分子筛吸附剂都有高的吸附作用，且其强度高。

Twenty fiveⅠB andⅣB metal iodides were synthesized and sturcuturally characterized with X-ray single crystal diffractometer method.

采用基于GGA/PW91方法的CASTEP程序研究了上述化合物的成键和电子结构特征。

This paper reported the synthetic method of polymethine styrylcyanines from benzotellurazolium iodides.

本文首次报道了由苯并碲唑季铵碘盐合成多次甲基苯乙烯菁的方法。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。