101.07 amu
dimer vibrational frequency = 347.1
dimer force constant = 3.59 mdyne/Å
References
"Raman Spectrum of Ruthenium Dimers"
Huaiming Wang, Yifei Liu, Hanae Haouari, R. Craig, John.
R. Lombardi
and D. M. Lindsay
J. Chem. Phys. 106, 6534 (1997).
Abstract
The absorption (scattering depletion) spectrum and resonance
Raman spectrum for Ru2 in an argon matrix prepared by the mass-selected
ion deposition technique have been obtained. The absorption spectrum in
the visible region shows a single broad transition centered at 470 nm.
Resonance Raman spectra, obtained by excitation into this band with dye
laser radiation, display a single sharp progression with lines at 343.8
(26) cm-1, 681.6 (32) cm-1, 1017.5(26) cm-1,
1350.2 (25) cm-1 and 1678.9 (8) cm-1. These data
give we = 347.1 ± 0.9 cm-1
with wece
= 1.85 ± 0.15 cm-1, leading to a spectroscopic dissociation
energy of 2.0 ± 0.2 eV. Sidebands in the Raman spectra are indicative
of a weak coupling (Huang-Rhys factor, S ~ 0.1 - 0.7) between the dimer
and the phonons of the argon host.
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