Nitrogen-14 nuclear quadrupole resonance studies of para-substituted benzene diazonium salts

Abstract

The first 14N nuclear quadrupole resonance results on the one-coordinated nitrogen atom of the diazonium group are reported. A series of para-substituted benzene diazonium cations is investigated and the Townes/Dailey theory is used to determine the electron populations of the nitrogen atomic orbitals as a function of a variety of para substituents. A linear relationship between π-electron populations at the one-coordinated nitrogen site and the Hammett σ p +′ s is obtained. Small variations in NQR resulting from interaction of different anions with the benzene diazonium cations are also perceptible by NQR tecniques.