查询词典 Lewis base

Hydrothermal reactions makes water a Bronsted base-acid and act as an effective catalyst and the metal ions represent Lewis base character. The conversion process occurs in a very complex network of parallel, consecutive and equilibrium reactions, and the last step being the catalyzed Cannizzaro-type reaction of pyruvaldehyde to lactic acid.

nsted酸碱并具有一定的催化作用，金属离子在水热催化降解丙酮醛生成乳酸中表现出Lewis碱的特性，能与丙酮醛生成金属复合物，最终生成乳酸，此反应过程符合Cannizzaro反应特性。

We postulate that this is a Lewis base activating Lewis acid reaction.

我们仔细研究了Lewis碱的变化对反应的影响，并根据实验结果提出了Lewis碱活化Lewis酸的反应机理。

Because substituted anilines have Lewis acid or Lewis base group, extractions with complexing agent was conducted.

由于取代苯胺都具有Lewis酸性或Lewis碱性官能团，采用相应的络合剂进行了络合萃取的研究。

This trend depended on the strength of Lewis base sites M=O and activity of lattice oxygen of catalysts.

这一顺序与各催化剂表面的Lewis碱位M=O碱性的强弱、双键晶格氧活性相一致。

The acidity of Lewis acid sites and the basicity of Lewis base sites influence the intensity between water, 1,2-dichloropropane and catalyst. The specific area of catalyst influences the capacity of adsorption.

催化剂Lewis酸位和Lewis碱位的酸碱强度直接影响水、1，2－二氯丙烷与催化剂的作用强度，而催化剂的表面积直接影响吸附量。

Density functional theory calculations at the B3LYP/6-31G level of theory were employed to study the mechanism and the potential energy surface of Diels-Alder reactions between Lewis base stabilized borabenzene and dienophiles.

采用密度泛函理论方法在B3LYP/6-31G水平上研究了Lewis碱稳定的硼代苯与一些亲二烯体的两种可能的Diels-Alder反应的微观机理和势能剖面，并研究了反应的溶剂效应和取代基效应。

There exist Lewis base sites (M=O and M-O-M or M-O-P) and Lewis acid sites on the surface of these catalysts.

催化剂表面的活性基元由Lewis碱位M=O键的端氧和M-O-M或M-O-P键的桥氧位，Lewis酸位M〓组成。

The results showed that there existed Lewis base sites (M=O and M-O-Fe) and Lewis acid sites on the surface of these catalysts.

研究表明，Fe-V-O、Fe-Mo-O、Fe-P-O和Fe-Al-P-O催化剂表面活性基元都是由Lewis碱位（M=O键的端氧和M-O-Fe键的桥氧位）和Lewis酸位组成。

Nsted acid to activate the carbonyl group of the substrate and iV-oxide as Lewis base to activate TMSCN.

即：催化剂中的酰胺作为Brnsted酸活化羰基，氮氧偶极作为Lewis碱活化TMSCN。

The results showed that C 2H 6 can be adsorbed on the surface terminal oxygen of Lewis base site P=O bonds through H atom in -CH 3 to form a molecular adsorption state, and the adsorption intensity of C 2H 6 increases with the rising of adsorption temperature.

结果表明，乙烷能够以 CH3 中的H原子吸附于催化剂表面P =O键的端氧上形成分子吸附态，并且随着吸附温度的升高，对乙烷的吸附强度逐渐增大；乙烯则主要是以C =C双键吸附在催化剂的Lewis酸位Fe3 +上。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。