Effect of Substituents on Benzene Skeleton Vibration in IR Spectra;
红外光谱中取代基对苯环骨架振动吸收峰的影响规律
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 found that the catalytic activity of oxazaphospolidine—borane is concerned by various substituents connecting with phosphorus atom and the charge distributing on phosphorus and boron atoms in oxazaphospolidine—borane catalysts.
根据优化所得催化剂的几何构型和电子结构,从空间效应和电子效应两方面对催化剂分子进行了分析和讨论,以期从理论上揭示取代基对手性唑磷—硼烷催化活性的影响。
The influence of substituents on nitriliums with bicycle[2.2.1]-hept-2-ene;
氮杂炔正离子与环烯反应的机理及取代基效应
The influence of different substituents to the addition reaction also has been investigated to research into the reaction law.
并在同一水平上研究了当R,R1和R2分别为不同烷烃取代基的同分异构体时,得到不同产物的反应情况,找出这类反应随取代基不同的变化规律。
The effects of substituents on the nucleophilic reaction of benzyl halide and sodium azide were studied.
合成了叠氮苄、对氰基叠氮苄,对氟叠氮苄,对甲基叠氮苄和联苯二叠氮苄,研究了苯环上不同取代基对苄基卤代物与叠氮化钠经亲核取代反应生成苄基叠氮化物的反应的影响。
Theoretical study on the effect of substituting group on the electronic spectrum of 8-hydroxyquionline lithium;
取代基对8-羟基喹啉锂电子光谱影响的理论研究
the orientation rule of substituting groups in benzene ring is often explained with electronic effect (inductive effect and conjugative effect).
有机化学教材中通常是从电子效应(诱导和共轭)来解释苯环上取代基的定位规律。
The effect of the substituent number and position on second order nonlinear-optical coefficientsβ was studied.
研究了取代基数目及取代基位置对非线性光学效应的影响.
The effect of substituent on the fluorescence emission spectrum of p-substituted benzyl compounds
p-取代苯基化合物荧光发射光谱中取代基效应的定量研究
The extraction behavior of dialkyl( aryl) Sulfides may be controlled by polar and steric substituents effects.
二烃基(基)醚的萃取行为受极性和空间取代基效应的控制.
Electron structure and substituent effects of o-,m-,p-IC_6H_4OCH_3 iodoanisoles
o-,m-,p-IC_6H_4OCH_3的电子结构和取代基效应
Study on the Reaction of α-Carbonyl-N, N-Disubstitued Thioformamides;
N，N-二取代—α—羰基硫代甲酰取代胺的反应研究
Structure Studies of Bis(substituted)-2-(substituted)-8-hydroxyqui-nolines
双-(取代)硼酸-2-(取代)-8-羟基喹啉酯的结构研究
Synthesis of N(Substituted) aryl,3,5 risubstituted by azole-4-carboxamide Derivatives;
N-(取代)芳基-1,3,5-三取代吡唑-4-酰胺的合成
Study on Novel High Effect Herbicides with Substituted Phenyl Isoxazole and Substituted Phenyl Pyrazole Structure;
高效新农药取代苯基异噁唑和取代苯基吡唑类除草剂的研究
Synthesis and Antimicrmatic Activities of N-substituted Phenyl-N -substituted Benzimidazol-2-yl Acylureas;
N-取代苯基-N’-（2-取代苯并咪唑甲酰基）脲的合成及其抑菌活性
The Synthesis of Calixarene Polysiloxane Stationary Phases With Different Substitution;
乙酰异丙胺基取代和丁基取代杯[4]芳烃聚硅氧烷固定相的合成
Melting synthesis of substituted(unsubstituted)-4′-nitrodiphenyl ethers
取代的(未取代的)-4′-硝基二苯基醚类化合物的熔融法合成
Determination of the molar substitution degree and substitution position of hydropropyl guar gum
羟丙基瓜尔胶中羟丙基摩尔取代度以及取代位置的表征
Synthesis of N-substituted-S-(+)-3-methyl-2-(4-chlorophenyl)butyryl(thio)urea
N-取代-S-(+)-3-甲基-2-对氯苯基丁酰基(硫)脲的合成
The Easter Bunny has once more replaced the Christ
复活节兔子已再一次取代了基督
Selective Oxidation of 4-Substituted-2, 6-di(hydroxymeth yl) phenols
4-取代-2,6-二(羟甲基)苯酚的选择氧化
EFFECT OF CARBOXYMETHYL STARCH WITH LOW DEGREE OF SUBSTITUTION ON THE ADHESION BEHAVIOR TO TEXTILE FIBERS
低取代度羧甲基淀粉对纤维粘附性能
The Synthesis of a Series of O-Substituted Hydroxylamines;
一系列O-取代烷基羟胺化合物的合成
The Studies of Ester Substituted Copper Phthalocyanines and Their Composites;
酯基取代酞菁铜及其复合材料的研究