THE PERMANENT ELECTRIC DIPOLE MOMENTS OF THE $^{3}\Pi$ and $^{3}\Delta$ STATES OF RUTHENIUM MONOCARBIDE, RuC
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Date
2004
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Publisher
Ohio State University
Abstract
Elucidating the structure and function of the chemically pervasive transition metal-carbon bond is a problem of both fundamental and applied scientific interest. Recent insight into the nature of the metal-carbon bond has been due to high-resolution gas-phase spectroscopy of the diatomic monocarbides, where measurement of permanent electric dipole moments and hyperfine structure are particularly informative. Ruthenium monocarbide has garnered recent $interest^{a b c d e f}$ due to its ease of production, intense visible electronic transitions and large magnetic hyperfine structure. We report on the investigation of the $(0,0) \{12.7\}^{3}\Pi_{2} - \{0.1\}^{3}\Delta_{3}$ and $(0,0) {13.9}^{3}\Pi_{1} - \{0.9\}^{3}\Delta_{2}$ band systems using high-resolution laser induced fluorescence spectroscopy. Stark shifts of the $^{102}RuC$ and $^{104}RuC$ isotopomers were analyzed to produce the magnitude of the permanent electric dipole moments for the $^{3}\Delta_{3},{^{3}}\Delta_{2},{^{3}}\Pi_{2}$ and $^{3}\Pi_{1}$ states. The measured moments prompt a discussion of the electronic structure and bonding in the $^{3}\Delta$ and $^{3}\Pi$ electronic states. Dipole moment trends are most informative when coupled to molecular orbital correlation diagrams. The measured dipole moments can be used as true benchmarks for rigorous electronic structure calculations. A comparison with isovalent FeC is $made.^{g}$
Description
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Author Institution: Department of Chemistry and Biochemistry, Arizona State University; Physical and Theoretical Chemistry Laboratory, Oxford University
Author Institution: Department of Chemistry and Biochemistry, Arizona State University; Physical and Theoretical Chemistry Laboratory, Oxford University