INFRARED AND RAMAN SPECTRA OF SE42+ ION

Infrared and Raman spectra have been recorded for a number of compounds that have been shown to contain the Se42+ ion. Characteristic vibrational frequencies for Se42+ were observed at 188 and 327 cm-1 in the Raman spectrum and at ~306 cm-1 in the infrared spectrum. These have been assigned, respectively, to the B2g, A1g, and Eu fundamentals of a square-planar (D4h) arrangement of selenium atoms. A normal-coordinate analysis based on a Urey-Bradley force field yields a value of 2.2 mdyn/Å for the Se-Se stretching force constant. A relatively novel technique for recording the infrared spectra of highly reactive solids is described. © 1969, American Chemical Society. All rights reserved.