Rotational Tunneling of Matrix-Isolated Tetramethyl Compounds
Sn(CH3)4 was isolated in solid argon, krypton and SF6, and Pb(CH3)4 in argon. Tunneling transitions are reported at 68 and 83 μeV for Sn(CH3)4 and 290 μeV for Pb(CH3)4 in argon. In Kr and SF6 matrices no well-defined tunneling transitions were observed, probably due to disorder in the packing site. Hindrance potentials for the methyl group rotation with a high sixfold contribution are found, since the tunneling methyl groups are parallel to 111-planes of the argon lattice and thus face a symmetric environment. Furthermore, the assignments of ν8, ν19 and of a mode at 11 meV are discussed on the basis of far-IR data.
KeywordsCage Argon Recrystallization Krypton Tetramethyl
Unable to display preview. Download preview PDF.
- 3.M. Prager, W. Langel: J. Chem. Phys. (in press)Google Scholar
- 4.M. Prager, W. Langel: Proc. of the 41st Int. Meeting on Phys. Chem., Grenoble, 1986 (in press)Google Scholar
- 5.Y. Kataoka, W. Press, U. Buchenau, H. Spitzer: In Neutron Inelastic Scattering 1977, Vol. 1, p. 311, Vienna 1978Google Scholar
- 7.W. Langel, W. Schuller, S. Popp, E. Knözinger (to be published)Google Scholar