THE PURE ROTATIONAL SPECTRA OF CrS (X$^{5}\Pi_r$): CONTINUED STUDIES OF THE 3d TRANSITION METAL SULFIDES
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Date
2009
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Publisher
Ohio State University
Abstract
The pure rotational spectrum of CrS has been measured in the ground X$^{5}\Pi_r$ state using gas-phase direct absorption methods in the frequency range of 280-405 GHz. The molecule was created by the reaction of chromium vapor, sublimed in a Broida oven, with hydrogen sulfide gas. All five spin components were observed in eleven rotational transitions, and lambda-doubling splitting were resolved in the $\Omega $ = 0, 1 and 2 ladders. The data were fit with a Hund s case(a) Hamiltonian and rotational, spin-orbit, spin-spin, and lambda-doubling constants have been established. A bond length of 2.0781 \AA{} was derived from the data. Using the lambda-doubling parameters, the energy difference between the ground X$^{5}\Pi$ and excited $^{5}\Sigma$ state was estimated to be 1400 cm $^{-1}$.
Description
Author Institution: Department of Chemistry, Department of Astronomy, Steward Observatory, University of Arizona, Tucson, AZ 85721