查询词典 bromide

When bromine was used to bromization reaction with 4-acetyl-guaiacol,the product bromide incompletely or super bromide partial,and the selectivity was poor.

使用单质溴与4-乙酰基愈创木酚进行溴化反应时，产物溴化不完全，或者局部过量的溴化，且选择性较差。

Potassium bromide produced in the elimination step was cleaned with steam treatment, then used to bromize tert-Butyl alcohol, producing tert-butyl bromide.

为了回收中间元素澳，用水蒸汽蒸馏方法除去脱漠化氢后生成演化钾盐中的杂质，通过添加硫酸以再生漠化钾用于叙丁醇漠化制漠代叔丁烷。

Dibenzyl oxalate was synthesized from oxalic acid, potassium hydroxide and benzyl bromide under microwave irradiation using tetrabutylammonium bromide as phase-transfer catalyst and polyethylene glycol-200 as solvent.

在微波辐射条件下，以草酸、氢氧化钾和溴化苄为原料，四丁基溴化铵为相转移催化剂，聚乙二醇200为溶剂合成了草酸二苄酯，并通过熔点和红外光谱对产物的结构进行了表征。

The chapter two was focused on the samarium diiodide promoted organic reactions and their applications in organic synthesis, firstly, a new synthesis of highly substituted cyclopentadienes from a,β-alkynone promoted by samarium diiodide was investigated and the highly substituted cyclopentadienes were prepared in moderate to good yields under mild conditions. Secondly, the Michael addition and Michael-aldol tandem reaction of diorganyl diselenides or diorganyl disulfides with α,β-alkynones mediated by samarium diiodide were studied and a series of alkenylsulfides and alkenylselenides were prepared in good yields. Then the highly regioselecfive nucleophilic addition of the allylsamarium bromide to α,β-alkynones were explored. We found that the allylsamarium bromide reacts with α,β-alkynones to afford regiospecificly 1. 2-nucleophilic addition products in good yields under mild condition. At last we studied the coupling reaction of aryl halides promoted by NiCl〓/PPh〓/Sm〓.

第二章 研究了二碘化钐、金属钐促进的有机反应：1、二碘化钐促进下α，β-炔基酮的偶联环化反应，提供了一种制备多取代环戊二烯的新方法；2、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮的Michael加成反应，为高产率地制备多取代的烯基硫或烯基硒化合物提供了方便可靠的新方法；3、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮和醛、酮的Michael—aldol串联反应，提供了一种一锅法高产率地制备多取代的含硫的烯丙基醇或含硒的烯丙基醇类化合物的方便可靠的原子经济性的新方法；4、烯丙基溴化钐与α，β-炔基酮的高度区域选择性的1，2-亲核加成反应；5、NiCl〓/PPh〓/Sm〓促进的卤代芳烃的偶联反应-一种从各种卤代芳烃制备联苯类化合物的有效方法。

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用，通过低热固相反应，合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物；在络合法合成溶液高聚碘的实验中，选用几种络合剂通过络合作用首次合成了溶液高聚碘；树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料，通过离子交换，合成了碘三、碘五和碘七形式的树脂高聚碘。

Under the conditions of suitable pH, chondroitin sulfate was reacted with cationic surfactant, such as tetradecyl pyridinium bromide, tetradecyl dimethyl benzyl ammonium chloride, cetyl pyridinium chloride monohydrate and cetyl trimethyl ammonium bromide, to form stable association microparticles.

在适宜的pH条件下，硫酸软骨素可与溴代十四烷基吡啶等阳离子表面活性剂形成稳定的缔合物微粒。

In the presence of the phase transfer catalysts such as tetramethylammonium bromide, tetraethylammonium bromide or polyethylene glycol(MW 400 and 6,000),lithium hydroxide is the best alkali among lithium hydroxide ,sodium hydroxide and potassium hydroxide.

研究表明在溴化四甲基铵、溴化四乙基铵、聚乙二醇（分子量为6，000）和聚乙二醇（分子量为400）相转移催化体系中，氢氧化锂最好，氢氧化钾次之，氢氧化钠最次。

It was found that tribromide quaternary ammonium salt was an excellent bromide reagent, which was easy to handle and had low toxicity. The reaction can process rapidly and has high bromide rate.

研究结果表明，三溴季铵盐是一种性能优良的固体溴化剂，操作方便，对人体的危害性小，反应速度快，溴化率高。

From July 1, 2006, the new electronic and electrical products into the EU market, lead, mercury, hexavalent chromium, polymerization bromide biphenyl or polymerization bromide diphenyl ether content must not exceed 0.1% of the weight of the components, the cadmium content of no more than 0.01% of the weight of the host material.

从2006年7月1日起，新投入欧盟市场的电子电器产品中铅、汞、六价铬、聚合溴化联苯或者聚合溴化联苯乙醚含量不得超过该元件的重量的0.1%，镉的含量不得超过所在材料重量的0.01%。

High-density fluids include solids-free, potassium chloride, sodium chloride, calcium chloride, zinc bromide and calcium bromide formulations.

高密度液体包括无固体的氯化钾、氯化钠、氯化钙、锌、溴铵和溴化钙制剂。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。