Considering the field effect, the steric hindrance of primary hydrogen is the smallest, and SN2 reaction is easy to occur. Tertiary hydrogen has the largest steric hindrance and is prone to SN 1 reaction. Considering the electronic effect, the SN2 reaction has almost nothing to do with the electronic effect. In SN 1 reaction, the positive ion Sp2 of tertiary carbon hybridizes, the three methyl groups are well dispersed, the positive charge of tertiary carbon is shared, and the reactivity of tertiary hydrogen is increased. It is concluded that the reaction types of primary hydrogen, secondary hydrogen and tertiary hydrogen are different, and it is difficult to judge which one has high activity.

Activities:

Activity refers to an extremely general and non-specialized term, which was originally applied from the activity of ions and enzymes in solution to the functional activities of advanced living systems and physiological institutions. Activity refers to an active nature, which has vitality and can be tenacious and active. It has the dual characteristics of physical adsorption and chemical adsorption, and can selectively adsorb various substances in gas phase and liquid phase, thus achieving the purposes of decolorization, purification, disinfection and deodorization, and decontamination.