A study of thermodynamic properties of halogenated methane by the method of chemical bond parameter function
用键参数函数法研究卤代甲烷的热力学性质
Molecular structural parameters including inductive effect index(∑I),equilibrium electronegativity of atom(XE),total electron of atom nuclear external(∑e),total bond length of substituents to center atom(∑d) and electronegativity margin for all substituents(ΔX) were used model the 13C chemical shift of 45 halogenated methane.
利用描述电子效应的诱导效应指数(∑I)、原子的平衡电负性(XE)和反映核外电子云变形程度的总电子数(∑e)、各取代基到中心原子的化学键键长总和(∑d)以及各取代基电负性的和差值(ΔX)等参数对45个卤代甲烷化合物中的碳原子结构进行表征,并与其13CNMR谱化学位移建立了优良的定量结构-波谱关系模型:δC=-7403。
A correlation was investigated between the boiling points and molecular structure of halogenated methanes, and a new method was developed to calculate and predict the boiling points of halogenated methanes.
探讨了卤代甲烷的沸点与其分子结构之间的关系 ,发展了一种既能计算卤代甲烷沸点、又能预测未知卤代甲烷沸点的方法 。
Effect of Electronegativity and Polarizability on the C 1s Core Ionization Energies of Halomethanes;
原子电负性和极化度对卤代甲烷C 1s电子电离能的影响
The electrostatic effect constants for the substituents in an aromatic system were used firstly to study the bond dissociation enthalpy (BDE) of a halomethane system Y-CHnX3-n (n=0,1,2 and 3; Y=H,F,Cl,Br and I; X=F,Cl,Br and I).
将芳环上取代基的电子效应参数引入卤代甲烷,以卤代甲烷分子Y-CHnX3-n(n=0～3;Y=H,F,Cl,Br,I;X=F,Cl,Br,I)中Y—C键的标准键焓EYs-C与中心C原子相键连原子的场/诱导效应之和ΣFi、共轭效应之和ΣRi以及诱导偶极之和Σ(α×F)为参数,建立了一个定量估算卤代甲烷分子中Y—C键离解能(BDE)的通用模型,BDE(Y—C)=57。
It is observed that the removal efficiencies and the sonolysis rate constants of three halomethanes after 1h ultrasonic irradiation fitted the following increasing order:CHCl3< CHBrCl2<CCl4,and the degradation of halomethanes studied followed the pseudo-first-order kinetics model,respectively.
以饮用水中痕量氯仿、四氯化碳和一溴二氯甲烷3种卤代甲烷为目标化合物,采用超声辐照技术研究它们在不同条件下的去除效果。
Modeling the Δ_fH_m~θ of halomethanes based on support vector machines;
基于支持向量机的卤代甲烷Δ_fH_m~θ模型的构建
Modeling Δ_fH_m~θ based on AM1 quantum chemistry parameters of halomethanes in radial basis function neural network;
基于AMl量化参数的卤代甲烷Δ_fH_m~θRBF—NN模型的构建
Chemical Reactions of Laser Ablated Ti Atom with Halomethanes in Gas Phase;
金属Ti原子与卤代甲烷的气相反应研究
Code for design of haton 1211 fire extinguishing systems
卤代烷1211灭火系统设计规范
Halon1301 system
卤代烷1301系统
bromochlorodifluoromethane [BCF] [halon 1211]
溴氯二氟甲烷〔1211灭火剂〕
bromochlorodifluoromethane [halon 1211] [CF2BrCl]
溴氯二氟甲烷〔哈龙1211〕
Halon replacement
卤代烷灭火剂替代品
halon gas extinguishing system
卤代烷气体灭火系统
Halon1301 battery
卤代烷1301灭火剂钢瓶组
Amines can engage in nucleophile substitution reaction with alky.
胺能参加与卤代烷的亲核取代反应。
Marine halon fire extinguishing system technical specifications
GB/T14088-1993船用卤代烷灭火系统技术条件
Code for design of halon 1301 fire extinguishing systems
卤代烷1301灭火系统设计规范
Halon1301 design concentrations for flame extinguishment
卤代烷1301灭火剂设计灭火浓度
Halon1301 design concentrations for inerting
卤代烷1301灭火剂设计惰化浓度
Study on the Vapor-Liquid Equilibra of the Multicomponent Systems Containing Halogenated Silane;
多元卤代硅烷体系的汽液相平衡研究
Equation for the Prepation of Amines from Alkyl Halides and Ammonia;
关于卤代烷与氨反应制备胺的方程式
This reaction, called the Hofman elimination, is quite analogous to the dehydrohalogenation of an alkyl halide.
这个反应称为Hofman消除反应，它很像卤代烷的脱卤化氢反应。
Application of MATLAB in Calculating Halogenated Silane Phase Equilibrium;
MATLAB在卤代硅烷体系相平衡计算中的应用
Cloning and Functional Analysis of Methyl Halide Transferase;
卤代甲烷—甲基转移酶基因的克隆和功能研究
Field-Assisted Dissociative and Ionization of Dihalomethane Compounds Induced by Femtosecond Laser Field;
飞秒激光场下卤代烷烃分子的场致解离和电离
