網(wǎng)絡(luò)釋義

用法例句

A study of thermodynamic properties of halogenated methane by the method of chemical bond parameter function

用鍵參數(shù)函數(shù)法研究鹵代甲烷的熱力學(xué)性質(zhì)

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.

利用描述電子效應(yīng)的誘導(dǎo)效應(yīng)指數(shù)(∑I)、原子的平衡電負(fù)性(XE)和反映核外電子云變形程度的總電子數(shù)(∑e)、各取代基到中心原子的化學(xué)鍵鍵長總和(∑d)以及各取代基電負(fù)性的和差值(ΔX)等參數(shù)對45個鹵代甲烷化合物中的碳原子結(jié)構(gòu)進(jìn)行表征,并與其13CNMR譜化學(xué)位移建立了優(yōu)良的定量結(jié)構(gòu)-波譜關(guān)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.

探討了鹵代甲烷的沸點(diǎn)與其分子結(jié)構(gòu)之間的關(guān)系 ,發(fā)展了一種既能計算鹵代甲烷沸點(diǎn)、又能預(yù)測未知鹵代甲烷沸點(diǎn)的方法 。

Effect of Electronegativity and Polarizability on the C 1s Core Ionization Energies of Halomethanes;

原子電負(fù)性和極化度對鹵代甲烷C 1s電子電離能的影響

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).

將芳環(huán)上取代基的電子效應(yīng)參數(shù)引入鹵代甲烷,以鹵代甲烷分子Y-CHnX3-n(n=0～3;Y=H,F,Cl,Br,I;X=F,Cl,Br,I)中Y—C鍵的標(biāo)準(zhǔn)鍵焓EYs-C與中心C原子相鍵連原子的場/誘導(dǎo)效應(yīng)之和ΣFi、共軛效應(yīng)之和ΣRi以及誘導(dǎo)偶極之和Σ(α×F)為參數(shù),建立了一個定量估算鹵代甲烷分子中Y—C鍵離解能(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.

以飲用水中痕量氯仿、四氯化碳和一溴二氯甲烷3種鹵代甲烷為目標(biāo)化合物,采用超聲輻照技術(shù)研究它們在不同條件下的去除效果。

Modeling the Δ_fH_m~θ of halomethanes based on support vector machines;

基于支持向量機(jī)的鹵代甲烷Δ_fH_m~θ模型的構(gòu)建

Modeling Δ_fH_m~θ based on AM1 quantum chemistry parameters of halomethanes in radial basis function neural network;

基于AMl量化參數(shù)的鹵代甲烷Δ_fH_m~θRBF—NN模型的構(gòu)建

Chemical Reactions of Laser Ablated Ti Atom with Halomethanes in Gas Phase;

金屬Ti原子與鹵代甲烷的氣相反應(yīng)研究

Autocorrelation Topological Research of the First Ionization Potentials for Haloalkanes;

鹵代烷第一電離能的自相關(guān)拓?fù)溲芯?/p>

987?7)with the standard entropies of 88 haloalkanes.

其中0 TX,1Tc 與 88種氣態(tài)鹵代烷標(biāo)準(zhǔn)熵 (Sθm)顯著相關(guān) ,其復(fù)相關(guān)系數(shù)R為 0 9877,明顯優(yōu)于Kier的0 xv,1xv(其R僅為 0 75 97) 。

Study on the Vapor-Liquid Equilibra of the Multicomponent Systems Containing Halogenated Silane;

多元鹵代硅烷體系的汽液相平衡研究

Application of MATLAB in Calculating Halogenated Silane Phase Equilibrium;

MATLAB在鹵代硅烷體系相平衡計算中的應(yīng)用

Halon1301 system

鹵代烷1301系統(tǒng)

Halon replacement

鹵代烷滅火劑替代品

halon gas extinguishing system

鹵代烷氣體滅火系統(tǒng)

Halon1301 battery

鹵代烷1301滅火劑鋼瓶組

Amines can engage in nucleophile substitution reaction with alky.

胺能參加與鹵代烷的親核取代反應(yīng)。

Marine halon fire extinguishing system technical specifications

GB/T14088-1993船用鹵代烷滅火系統(tǒng)技術(shù)條件

Code for design of halon 1301 fire extinguishing systems

鹵代烷1301滅火系統(tǒng)設(shè)計規(guī)范

Code for design of haton 1211 fire extinguishing systems

鹵代烷1211滅火系統(tǒng)設(shè)計規(guī)范

Halon1301 design concentrations for flame extinguishment

鹵代烷1301滅火劑設(shè)計滅火濃度

Halon1301 design concentrations for inerting

鹵代烷1301滅火劑設(shè)計惰化濃度

Equation for the Prepation of Amines from Alkyl Halides and Ammonia;

關(guān)于鹵代烷與氨反應(yīng)制備胺的方程式

This reaction, called the Hofman elimination, is quite analogous to the dehydrohalogenation of an alkyl halide.

這個反應(yīng)稱為Hofman消除反應(yīng)，它很像鹵代烷的脫鹵化氫反應(yīng)。

Investigation of Silane Crosslinked and Flame Retardant Polyolefin Elastomer Composites;

硅烷交聯(lián)聚烯烴彈性體無鹵阻燃復(fù)合材料的研究

Cloning and Functional Analysis of Methyl Halide Transferase;

鹵代甲烷—甲基轉(zhuǎn)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;

飛秒激光場下鹵代烷烴分子的場致解離和電離

Palladium-catalyzed Intramolecular Coupling Reaction of Aryl Halide with Alcohol;

鈀催化芳基鹵代烷與醇的分子內(nèi)偶聯(lián)反應(yīng)