Electron spin resonance spectra of the six symmetrical diazanaphthalene anions in N,N-dimethylformamide have been measured. The anions were generated within the microwave cavity by electro-reduction of the parent compound. The McConnell equationaH=QCCHρChas been tested for the diazanaphthalenes withρCvalues calculated by the Hückel method and by the Pariser-Parr-Pople S.C.F. method with variable resonance integrals.