The high-resolution spectrum of natural abundant germane in the region 9775-9950 cm 01 has been recorded. The observed spectrum is assigned as the (5000) stretching overtone band in local mode notation, which exhibits a striking resemblance to the K structure of parallel band of a symmetric top molecule. The observed transitions are analyzed in both the normal mode and the local mode pictures. The local mode vibration behavior of this state is also discussed. The stretch potential surface is optimized by least squares fitting the band centers of all the germane isotopic species. An alternative approach is proposed to calculate the effective vibration-rotational parameters using the vibrational wavefunction obtained by the anharmonically coupled anharmonic oscillators model. α§ 1997 Academic Press
EXPERIMENT AND RESULT
A 1 : (5000), [(3200) / (3020) / (3002)]/ 3, and (2111), etc.; Germane was synthesized in our laboratory by the following procedure (4). Germanium oxide and potassium tetrahy-F 2x : (4100), ( 3011), (0500), droborate were dissolved in potassium hydroxide aqueous solution. The solution was slowly added into glacial acetic and [(0140) / (0104)]/ 2, etc. acid under the protection of argon. The produced gases were distilled through two traps which were immersed in an alco-Those of F 2y and F 2z can be written similarly to that of F 2x .
There are strong Darling-Dennison resonances between the normal mode basis with the same symmetry (called 1 To whom the correspondence should be addressed.