We use the terms primary, secondary, and tertiary to refer to the substitution level that a given carbon has in a molecule. In other words, these terms are used to describe how many other carbons a given carbon is attached to. So to figure out the substitution level of any given carbon,...
aEach one of the primary, secondary, and tertiary nitrogens present in PEI in a 1:2:1 ratio has a different pKa value, and their values reflect the influence they have on one another because of separation by only two methylene carbons. 每一个主要,次要和三重nitrogens当前在PEI在1:2 :1...