Composition of Some Conducting Complexes of 1,6-Diaminopyrene

The absorption spectra of solid complexes of 1,6-diaminopyrene with quinones exhibiting high electrical conductivity show them to be mostly radical-ion salts. The mole fractions of ionic component for complexes with bromanil, chloranil, and 2,3-dichloro-5,6-dicyano-benzoquinone are 0.65, 0.90, and 0.95, respectively. This is the order of the estimated electron affinities of the acceptors but not of the conductivity of the complexes. The iodanil complex, with much higher resistivity, shows little ionic component.