查询词典 fluoride

Oxalyl fluoride neutral molecule ; trans-configuration ; cis-configuration ; density function theory; stability ; frequency analysis

草酰氟分子；平面反式构型；顺式构型；密度泛函；稳定性；频率分析

The configuration of oxalyl fluoride neutral molecule2 is studied at HF、MP2、QCISD and B3LYP level with 6-311++G** basis sets.

方法采用量子化学中从头算的方法HF、MP2、QCISD和密度泛函中的方法B3LYP在6-311++G**水平上对草酰氟中性分子2做了构像分析，在B3LYP/6-311++G**水平上，分子轨道分析和自然键轨道分析研究了2种构型的稳定性。

The process of the present invention consists in bringing into contact, on the one hand, gaseous phosphorus pentafluoride or a gaseous mixture comprising phosphorus pentafluoride and hydrochloric acid, and, on the other hand, a solution of lithium fluoride in hydrofluoric acid, in a column (10) having a sufficient number of transfer units to carry out the reaction of PF5 with LiF under the chosen conditions of temperature, of pressure and of molar ratio of the two contrasting reactants and with complete or substantially complete absorption of the PF5 in the column.

本发明方法是让气态五氟化磷或五氟化磷与盐酸的气态混合物与氟化锂的氟氢酸溶液在塔（10）中接触，该塔转化单元数足以在选定温度、压力与两种反应剂摩尔比条件下使PF5与LiF反应，塔中五氟化磷完全或基本完全被吸收。

A process of preparing phosphorus pentafluoride was put forward: first, mesneproduct was prepared from phosphorus pentoxide and anhydrous hydrogen fluoride; second, phosphorus pentafluoride was acquired after dealing with the hexafluorophosphoric acid.

本文以五氧化二磷和无水氟化氢为原料，首先制备中间产物六氟磷酸，再通过对六氟磷酸进行处理以生产五氟化磷。

Objective To study the accumulation of fluoride in rat brain tissue and its effect on the level of lipid peroxidation and antioxidative ability.

目的 研究氟在大鼠脑组织中的蓄积及其对脂质过氧化水平和抗氧化能力的影响。

In this report,ultra-fine diamond powder after rough purification was used as raw material,of purification ,some kinds of reagents,such as cerium,fluoride and persulphate,were are selected to test their effects of purification .

以工业生产的粗提纯人造超细金刚石微粉为原料，从提纯原理的基础出发，采用铈盐、氟盐、过硫酸盐等试剂进行了提纯实验，并对每种试剂的实验结果、提纯工艺等进行了综合的分析比较。

In the part one, we reported a novel method for the synthesis of phenacyl esters by reaction of carboxylic acids with α-bromoacetophenone promoted by potassium fluoride.

论文的起始部分系统地综述了近些年来离子液体中各类烷基化反应和各类缩合反应的研究。

The effects of sodium silico-fluoride on the zeta-potential, hydrophility and adsorption of styryl phosphonic acid of diaspore particle surfaces have been systematically studied.

系统研究了氟硅酸钠对一水硬铝石表面ζ电位、亲水程度及苯乙烯膦酸吸附的影响，提出了苯乙烯膦酸浮选金红石与一水硬铝石时氟硅酸钠对一水硬铝石的选择性抑制作用机理。

With a small quantity of water a brownish yellow solution is formed, which, however, in a very short time becomes warm and the fluoride decomposes; platinic hydrate is precipitated, and free hydrofluoric acid remains in solution.

由于少量的水棕黄色的解决方案是一个形成，其中，然而，在很短的时间变得温暖和氟化物分解；铂水合物的沉淀和自由仍然氢氟酸溶液中。

The results show that the thermal stability and machine intensity were improved compared to Polyvinylidene Fluoride membrane...

结果表明，与聚偏氟乙烯膜相比，改性膜的热稳定性和机械强度均有所提高。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。