They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.They are highly specific for the reactions that they ...
We shall consider partitions of the edges of graphs and hypergraphs.我们将考虑图和超图的边的划分.In banquet halls folding partitions are very popular.在宴会大厅中可折叠的隔板很普遍.Partitions provided a segregation between the smoking and non-smokin...