查询词典 bromides

In comparison with the methyl bromides, the photodissociation dynamics of alkyl bromides with a long C-C chain has not been studied in detail.

相对而言，关于长链的溴代烷烃分子在第一吸收带光解的研究报道就很少。

The coupling reaction of aryl iodides, bromides and chlorides with differentolefins catalyzed by catalyst 2 and 4 was studied. It was found that compounds 2 and 4 anchored on active carbon are efficient catalyst for the Heck reaction in the case of aryl bromides and aryl chlorides as substrates (Scheme 3). It is notable that catalyst 4 has higher efficiency for aryl chlorides.___^H Cat.2 or 4, Base HXSolution, 100C or 140

以化合物2和4为代表，重点研究了活性炭负载的二茂铁亚胺环钯化合物催化碘代苯、溴代苯和氯代苯与活泼烯烃之间的偶联反应(Scheme 3)，发现活性炭负载的二茂铁亚胺环钯化合物2和4均可用于催化多种溴代和氯

We have investigated the Suzuki cross-coupling reaction of aryl bromides at low catalyst loading and low temperature.

经过一系列实验条件的摸索，采取了在比较低的催化剂用量和比较低的温度的实验条件下进行了一系列底物的Suzuki偶联反应，结果以极好的收率得到相应的偶联产物。

It is imaginable that the catalytic system could be used in cross-coupling of aryl bromides with other active methylene compounds.

预计该催化体系可以广泛用于溴代芳烃与其它含活泼亚甲基化合物的交叉偶联反应。

Suzuki cross-coupling of aryl bromides with arylboronic acid is one of effective methods to form biphenyl derivatives in organic synthesis.

研究了它们对 Suzuki偶联反应的催化作用，优化了这些催化剂在联苯类化合物合成中的反应条件。

The reaction of perfluoroalkyl bromide and a,w-perfluoralkylene dibromide in sulfinatodehalogenation system with olefins and the differences in behavior between perfluoroalkyl bromides and their corresponding iodides are reported.

本文报道溴代全氟烷和α，ω-二溴代全氟烷在亚磺化脱卤反应体系中与烯烃的反应及其与相应的碘代全氟烷的区别。

It is usually hard to recycle for its high content of brominated flame retardants, so the key of recycling the wPCB is to debrominate, i.e ., to convert the organic bromides into inorganic ones, e.g ., hydrogen bromide.

实现回收的关键在于脱溴，即将有机溴代物转化为无机溴化物。

This wor k deals with the effects ten of bromides and iodobenzene in catalytic hydrogenolysis debenzylation of 2,4,6,8,10,12-Hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane.

研究了溴苯等10种溴化物及碘苯在六苄基六氮杂异伍兹烷催化氢解脱苄中的作用。

Photodissociation of alkyl bromides has been a popular area of investigation, in view of their ozone depletion potential and of the fundamental interest in photodissociation dynamics.

溴代烷烃的光解近年来已成为十分活跃的研究领域，一方面是由于溴代烷烃的光解产物溴对臭氧层的破坏，另一方面是由于溴代烷烃光解研究的理论意义。

In fact, the behavior of alkyl bromides with a long C-C chain, which belong to Cs symmetry, is more similar to that of general polyatomic molecules.

这里，我们分别采用共振增强多光子电离方法、离子速度影象技术从不同的侧面研究了具有C-C长链和Cs对称性的溴代烷烃分子的光解动力学问题。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。