Spectrochemical Study of Microscopic Crystals. XIX The Structure and Absorption Spectra of Fremy’s Salt

Absorption spectra in the visible and ultra-violet region have been determined at room temperature by Tsuchida and Kobayashi’s microscopic method with crystals of Fremy’s salt and related compounds. Infrared absorption spectra have also been measured with these compounds. The results of the measurements are discussed in relation to the structure of the compounds. A steric condition, visible and ultra-violet absorption spectra and infrared spectra are found to be in best agreement with a structure having a peroxide grouping.