Diamine linkers for the synthesis of dendrimers based on melamine were identified using competition reactions. The relative reactivity of the surveyed cyclic monoamines varies by 40 times, expanding the previously identified series to an overall relative reactivity range of 320 times. Azetidine is 40 times more reactive than the cyclic, nine-membered ring (C8H17N), and 320 times more reactive than benzylamine. Reactivity differences are attributed to ...