查询词典 bromides

Our group first reported a novel dialkylation reaction of alkyl zinc iodides with aromatic aldehydes and an olefination reaction of benzyl zinc bromides with aromatic aldehydes respectively.

我们实验室分别首次报道了在过渡金属络合物催化下带官能团有机卤化锌试剂与芳香醛的双烷化反应和烯基化反应。

In particular, a process for the synthesis of nanopowders of various materials such as metals, alloys, ceramics and composites by induction plasma technology, using organometallic compounds, chlorides, bromides, fluorides, iodides, nitrites, nitrates, oxalates and carbonates as precursors is disclosed.

具体地，公开了一种通过感应等离子体技术合成各种材料，例如金属、合金、陶瓷和复合物的纳米粉末的工艺，使用有机金属化合物、氯化物、溴化物、氟化物、碘化物、亚硝酸盐、硝酸盐、草酸盐、碳酸盐作为前驱体。

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〓。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。