High-resolution spectroscopy and analysis of the nu(3) and nu(4) fundamentals of monoisotopic (GeF4)-Ge-70

The first high-resolution study on germanium tetrafluoride is reported. We used a monoisotopic sample of (GeF4)-Ge-70. The FTIR spectra of the two inf rared active fundamentals, namely the nu (4) (bending) and nu (3) (stretchi ng) modes, were recorded at a temperature of ca. 210 K and a resolution (1/ maximum optical path difference) of 0.0031 and 0.0023 cm(-1), respectively. These spectra were analyzed using the STDS software developed in Dijon. In both cases, we obtained a fit with a root mean square better than 1 x 10(- 3) cm(-1). Both bands show very regular structures with no detectable pertu rbation. (C) 2001 Academic Press.