INFRARED SPECTRA OF SILICON DIFLUORIDE IN NEON AND ARGON MATRICES

The species SiF2, produced by the reduction of SiF4 over Si metal at 1150°, has been isolated in solid neon and argon. From infrared absorption spectra the symmetric and antisymmetric fundamental frequencies have been obtained for the various natural isotopic species of SiF2. Also from these measurements the bond angle of SiF2 was calculated and found to be in good agreement with the known gas-phase value, thus indicating the absence of appreciable matrix effects. Absorptions attributable to polymeric SiF2 were also observed. © 1969, American Chemical Society. All rights reserved.