查询词典 chlorides

Its reaction with ketenes generated in situ from acid chlorides afforded-4--azetidin-2-one, thus provided a 14-member library of-4--azetidin-2-one with yields 76～91% and an excellent stereoselectivity.

我们从PEG支载的苯甲醛出发，经腙的制备及其氯代之后，在三辛胺作用下，由氯代腙原位生成的腈亚胺与亚胺发生[3+2]偶极环加成反应，得到PEG支载四芳基-4，5-二氢-1，2，4-三氮唑衍生物。

There are mainly three kinds of sedimentary minerals: fine sand, sulphates, and chlorides.

新疆罗布泊罗北洼地主要有粉砂、粘土沉积，硫酸盐沉积和氯化物沉积。

The internal causes are the effects of salts, particularly chlorides and sulphates, in the constituent materials, interaction between the constituent materials, such as alkali aggregate reaction, volume changes, absorption and permeability.

内部起因是盐，特殊氯化物的作用和硫化，在构成材料，互作用在构成材料之间，譬如碱聚集体反应、容积变化、吸收和渗透性。

The recent application of thionly chloride in organic synthesis is reviewed, mainly focusing on the preparation of chlorinated compounds, alkenes, esters, amides, nitriles, cyclic sulfites and sulfinyl chlorides.

综述了近年来氯化亚砜在有机合成中的应用进展，主要涉及氯代化合物、烃、及酰胺、、式亚硫酸酯、磺酰氯等化合物的制备。

Generally the catalysts have high activity and good selectivity. At present the coupling reactions of organoborahes with terminal olefins s acid chlorides and aryl halides play an important synthetic approaches in organoborane chemical. The catalysts can be used by many kinds of organometal compounds such as: irons cobalt nickel ruthenium rhodium palladiums titaniums zirconiums tins indium and lithium organic compounds; The achievement has been amazed in preparing of unsaturated or saturated compounds and in synthesizing of natural products bioactive molecules and chiral compounds.

目前，卤代烃与不饱和烃的偶联反应和有机硼试剂与酰卤和卤代烃的偶联反应已成为有机合成的研究热点，此类反应可用铁、钴、镍、钌、铑、钛、锆、锡、铟、锂等多种有机金属化合物来催化，用于形成含饱和或不饱和C-C键的化合物，并已在天然产物、液晶、具有生理活性物质和手性化合物的合成中应用。

Thermodynamic analysis show s that Fe-Cr-Ni alloys is not stable in SCWO conditions because Cr2O3 is not stable in these conditions.Formation of low melt po int metal chlorides may also be a reason for the high corrosion rates of the all oys.

热力学分析表明，Fe-Cr-Ni合金在高温氧化性介质中是不稳定的，并且低熔点金属氯化物的产生也可能是合金在超临界条件下出现高腐蚀速度的原因之一。

Monophenyltin trichloride reacts withdicarbonyl dicyclopentadienyl titanium immediately at room temperature, but no ti-tanium-tin complex produced, and the products were diphenyltin dichloride〓 and tin or stannous Chloride. When diaryltin dihalides were used, only the chlorides and bromides reacted with 〓form the complexes containing titaninm-tin bond,〓. but the corresponding iodide complex was not found. This reaction is Sensitive totemperature,when the temperature is belw 10℃,the reaction hardly takes place,but as the temperature is above 25℃,more 〓 will be found and the reactionbecome more complex.

Ph-SnC〓室温下即可与Cp〓迅速反应，但不生成含钛一锡链的化合物，而是生成Ph〓和Sn或Sn〓二芳基二卤化锡化物中，只有氯化物和溴化物才能和〓反应生成含钛〓锡键的化合物〓相应的碘化物则不行，而且反应对温度比较敏感，低于10℃，反应几乎不能进行，而高于25〓，则会生成更多的〓，在回流条件下得不到含钛〓锡键的化合物，只能得到分解产物，〓和Sn或〓。

Typically these hard waters are found to have high total dissolved solids including sulfates and chlorides, a pH in the range of 7.2 to 7.8, a high content of carbon dioxide (CO2) gas (over 10 parts per million, ppm), and the presence of dissolved oxygen D.O.

典型例子是这些硬水具有很高的溶解总固体含量，包括硫酸盐和氯化物，pH值在7.2至7.8之间，二氧化碳气体含量高，还存在溶解氧气体。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48