The maximum overlap method was used to study the relationships the C-H stretching frequencies, group electronegativities and proton acidity properties and the molecular structure in the halomethanes.
本文借助最大重叠杂化轨道理论，研究了卤代甲烷系列分子的红外伸缩频率，基团电负性和质子酸度等分子性质与结构的关系。
According to the great influence of system acidity and alkalinity on MCM41 molecular sieve formation in hydrothermal condition, a detailed formation mechanism of MCM41 was proposed.
在水热体系中，合成介质的酸碱性对MCM - 41分子筛的生成有很大的影响，据此提出了MCM - 41分子筛生成的详细机理。
Latest researches in SAPO-18 molecular sieve were reviewed with respect to its synthesis, structure, acidity and application in methanol-to-olefins (MTO) process.
介绍了SAPO - 18分子筛的合成、结构组成、酸性表征及其在催化甲醇制烯烃(MTO)反应中应用的最新研究情况。
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