The millimeter/sub-millimeter spectrum of the LiS radical in its 2Πi ground state

M. A. Brewster; L. M. Ziurys

doi:10.1016/S0009-2614(01)01202-7

The millimeter/sub-millimeter spectrum of the LiS radical in its ²Π_i ground state

M. A. Brewster, L. M. Ziurys

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Abstract

The pure rotational spectrum of LiS (X²Π_i) has been recorded in the v=0 and v=1 states in the region 130-540 GHz using millimeter/sub-millimeter direct absorption methods. This radical was synthesized from lithium vapor and CS₂ in a DC discharge. Transitions arising from the two orbit components were measured, both which exhibited lambda-doubling and, for the Ω=1/2 ladder, hyperfine interactions. Rotational, lambda-doubling, and hyperfine parameters have subsequently been determined. These data prove unambiguously that the ground state of LiS is ²Π_i and suggest that the A²Σ⁺ state lies ~4300cm^-1 higher in energy. The bonding in this radical appears to be predominantly ionic.

Original language	English (US)
Pages (from-to)	249-256
Number of pages	8
Journal	Chemical Physics Letters
Volume	349
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(01)01202-7
State	Published - Nov 30 2001

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(01)01202-7

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title = "The millimeter/sub-millimeter spectrum of the LiS radical in its 2Πi ground state",

abstract = "The pure rotational spectrum of LiS (X2Πi) has been recorded in the v=0 and v=1 states in the region 130-540 GHz using millimeter/sub-millimeter direct absorption methods. This radical was synthesized from lithium vapor and CS2 in a DC discharge. Transitions arising from the two orbit components were measured, both which exhibited lambda-doubling and, for the Ω=1/2 ladder, hyperfine interactions. Rotational, lambda-doubling, and hyperfine parameters have subsequently been determined. These data prove unambiguously that the ground state of LiS is 2Πi and suggest that the A2Σ+ state lies \textasciitilde{}4300cm-1 higher in energy. The bonding in this radical appears to be predominantly ionic.",

author = "Brewster, \{M. A.\} and Ziurys, \{L. M.\}",

note = "Funding Information: This research is supported by NSF Grant CHE-98-17707.",

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doi = "10.1016/S0009-2614(01)01202-7",

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T1 - The millimeter/sub-millimeter spectrum of the LiS radical in its 2Πi ground state

AU - Brewster, M. A.

AU - Ziurys, L. M.

N1 - Funding Information: This research is supported by NSF Grant CHE-98-17707.

PY - 2001/11/30

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N2 - The pure rotational spectrum of LiS (X2Πi) has been recorded in the v=0 and v=1 states in the region 130-540 GHz using millimeter/sub-millimeter direct absorption methods. This radical was synthesized from lithium vapor and CS2 in a DC discharge. Transitions arising from the two orbit components were measured, both which exhibited lambda-doubling and, for the Ω=1/2 ladder, hyperfine interactions. Rotational, lambda-doubling, and hyperfine parameters have subsequently been determined. These data prove unambiguously that the ground state of LiS is 2Πi and suggest that the A2Σ+ state lies ~4300cm-1 higher in energy. The bonding in this radical appears to be predominantly ionic.

AB - The pure rotational spectrum of LiS (X2Πi) has been recorded in the v=0 and v=1 states in the region 130-540 GHz using millimeter/sub-millimeter direct absorption methods. This radical was synthesized from lithium vapor and CS2 in a DC discharge. Transitions arising from the two orbit components were measured, both which exhibited lambda-doubling and, for the Ω=1/2 ladder, hyperfine interactions. Rotational, lambda-doubling, and hyperfine parameters have subsequently been determined. These data prove unambiguously that the ground state of LiS is 2Πi and suggest that the A2Σ+ state lies ~4300cm-1 higher in energy. The bonding in this radical appears to be predominantly ionic.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

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The millimeter/sub-millimeter spectrum of the LiS radical in its ²Π_i ground state

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