98057-36-4Relevant academic research and scientific papers
n-? Electron donor-acceptor complexes. II. Aliphatic amines with dinitrobenzenes
Singh, Joaquin O.,Anunziata, Jorge D.,Silber, Juana J.
, p. 903 - 907 (2007/10/02)
The interaction of several aliphatic amines as n-donors and dinitrobenzenes (DNB) as ?-acceptors has been studied in n-hexane.The formation of electron donor - acceptor (EDA) complexes is proposed to explain the spectroscopic behaviour of the mixtures.The stability constants (Ks) for these complexes have been calculated by an iterative procedure.For a given acceptor, the donor strength RNH2 > R2NH > R3N was found.This order is explained by considering the role that steric effect may play in the EDA complex formation.On the other hand, the fact that for a given donor Ks follows the order 1,2-DNB > 1,3-DNB > 1,4-DNB, and that 1,2-DNB reacts with primary amines, led to the proposal of orientational complexes.These EDA complexes may be considered intermediates in aromatic nucleophilic substitution reactions.
