Linnartz H, Motylewski T, Vaizert O, Maier JP, Apponi AJ, McCarthy MC, Gottlieb CA, Thaddeus P. Electronic Ground and Excited State Spectroscopy of C(6)H and C(6)D.
JOURNAL OF MOLECULAR SPECTROSCOPY 1999;
197:1-11. [PMID:
10438635 DOI:
10.1006/jmsp.1999.7885]
[Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Rotational transitions in the X(2)Pi ground state of C(6)H and C(6)D have been measured by Fourier transform microwave and millimeter-wave absorption spectroscopy. More than 150 rotational lines in the ground (2)Pi(3/2) and (2)Pi(1/2) ladders have been observed, allowing an accurate determination of the rotational, fine structure, lambda-doubling, and hyperfine coupling constants using a standard effective Hamiltonian for a molecule in an isolated (2)Pi electronic state. The molecular ground state constants are used to characterize the rotationally resolved origin band of the (2)Pi <-- X(2)Pi electronic transition observed by cavity ring-down laser absorption spectroscopy in a pulsed supersonic slit-jet discharge source. From these data, spectroscopic constants for the excited electronic state are determined. Copyright 1999 Academic Press.
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