Coriolis interaction in the local mode (n100;F2) combination states of GeH4

Coriolis interactions in local mode (n100) combination states of GeH4 are studied. Three widely used local mode models, the normal mode model with Darling-Dennison resonance included (NMDD) model and the anharmonically coupled anharmonic oscillator (ACAO) model with two different kinds of bond stretching variable, were used to calculate the values of the interaction parameters. As a test of these three models, the Coriolis interaction parameters of the local mode (3100) combination bands of the 74GeH4,72GeH4 and 70GeH4 species, recorded at a resolution of 0.015cm-1 on a Bruker IFS120HR Fourier transform spectrometer, are compared with the calculated results. There is good agreement.