G. A. Reynolds

The spectroscopy of pyrylium salts

Abstract The spectra of pyrylium perchlorate, various alkyl and aromatic derivatives, and cyanine-like dyes derived from pyrylium salts are discussed. These molecules are closely related to molecules which belong to the C2v point group, and the existence of the symmetry permits a more detailed discussion of the spectra than has been attempted heretofore.

The properties of tetraphenyldithiapyranylidene triiodides: Two new organic conductors

Abstract The electrical conductivity and thermoelectric power of two forms (tetragonal and orthorhombic) of the new organic conductor (tetraphenyldithiapyranilidene) (triiodide) [φ4DTP)(I-3)] have been measured. The tetragonal form φ4DTP(I-3)0.76 has a single-crystal conductivity of 120 Ω-1cm-1 at 295 K. A phase transition is observed in the tetragonal form at 165 K. The orthorhombic form φ4DTP(I-3)1.06 has a single-crystal conductivity of 2 Ω-1cm-1 at 295 K.

Effects of oxygen on the magnetic susceptibility of TCNQ salts

Abstract The effects of oxygen on the static magnetic susceptibility of two TCNQ salts, TTF-TCNQ and tetraphenyldithiapyranylidene (φ 4 DTP)-TCNQ, were measured. Differences in the temperature dependence of the magnetic susceptibility measured for TTF-TCNQ and φ 4 DTP-TCNQ indicate that the phenomenon is more complicated than oxygen condensation.