Induced dipole moments in the ν2/ν4 dyad of SnH4.

The linear Stark effect measured in the ν2/ν4 dyad of SnH4 by Doppler-free infrared–infrared double resonance spectroscopy has been analyzed. Fifteen double resonance signals in the vibrationally excited state and 12 previously reported signals in the ground state have been fitted simultaneously to an effective Stark Hamiltonian. The centrifugal distortion moment μ0 and the two vibration-induced moments μ44 and μ24 are determined to be μ0=1.499(11)×10-5 D, μ44=-1.317(42)×10-2 D, and μ24=3.94(23)×10-2 D. © 1995 American Institute of Physics. [ABSTRACT FROM AUTHOR]