Infrared intensities as a quantitative measure of intermolecular interactions. Part XX. The electronic nature of amino-, ammonio-, and diazonio-substituents
Abstract
Infrared intensities of series of meta-disubstituted benzenes show that the ND3+ and NMe3+ substituents are resonance donors. This is substantiated by the para-compounds; however, NMe3+ is a polarizable group. The diazonio-group N2+ is a strong acceptor substituent. The twisted NR2 group is a resonance donor of strength comparable to CHMe2.