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Author Evans, Corey J. ♦ Needham, Lisa-Maria E. ♦ Walker, Nicholas R. ♦ Köckert, Hansjochen ♦ Zaleski, Daniel P. ♦ Stephens, Susanna L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ BOND LENGTHS ♦ BORN-OPPENHEIMER APPROXIMATION ♦ COUPLING CONSTANTS ♦ ELECTRIC DIPOLE MOMENTS ♦ ELECTRONS ♦ FOURIER TRANSFORMATION ♦ GHZ RANGE ♦ GROUND STATES ♦ HYPERFINE STRUCTURE ♦ MICROWAVE RADIATION ♦ MICROWAVE SPECTRA ♦ MOLECULES ♦ TIN ♦ TIN IODIDES ♦ VIBRATIONAL STATES
Abstract Pure rotational spectra of the ground electronic states of lead monoiodide and tin monoiodide have been measured using a chirped pulsed Fourier transform microwave spectrometer over the 7-18.5 GHz region for the first time. Each of PbI and SnI has a X {sup 2}Π{sub 1/2} ground electronic state and may have a hyperfine structure that aids the determination of the electron electric dipole moment. For each species, pure rotational transitions of a number of different isotopologues and their excited vibrational states have been assigned and fitted. A multi-isotopologue Dunham-type analysis was carried out on both species producing values for Y{sub 01}, Y{sub 02}, Y{sub 11}, and Y{sub 21}, along with Λ-doubling constants, magnetic hyperfine constants and nuclear quadrupole coupling constants. The Born-Oppenheimer breakdown parameters for Pb have been evaluated and the parameter rationalized in terms of finite nuclear field effects. Analysis of the bond lengths and hyperfine interaction indicates that the bonding in both PbI and SnI is ionic in nature. Equilibrium bond lengths have been evaluated for both species.
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-28
Publisher Place United States
Journal Journal of Chemical Physics
Volume Number 143
Issue Number 24


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