IR-Spektren kristalliner, wasserfreier Permanganate, Pertechnetate und Perrhenate

Abstract

The infrared absorption frequencies in the region of the MeO₄ ^⊖ fundamental vibrations are reported for several crystalline permanganates, pertechnetates, and perrhenates. On the basis of the IR spectra of the crystals and of additional considerations correct frequencies are assigned to the ν₂(E) vibrations of the MeO₄ ^⊖ tetrahedra. The influence of the crystal field on the fundamental vibrations of the MnO₄ ^⊖, TcO₄ ^⊖, and ReO₄ ^⊖ ions is discussed, using site group analysis and factor group considerations.