University of Illinois Urbana-Champaign

Nuclear quadrupole coupling in due to the presence of two iodine nuclei

Orellana, W.

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2298.pdf
843366.pptx

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https://hdl.handle.net/2142/97134

Description

Title
Nuclear quadrupole coupling in due to the presence of two iodine nuclei
Author(s)
Orellana, W.
Contributor(s)
  • Novick, Stewart E.
  • Obenchain, Daniel A.
  • Arsenault, Eric A.
Issue Date
2017-06-23
Keyword(s)
  • (Hyper)fine structure
  • Tunneling
Date of Ingest
  • 2017-07-27T20:15:49Z
  • 2018-01-29T23:02:20Z
Abstract
The rotational spectrum of diiodosilane was measured with a jet-pulsed, cavity Fourier transform microwave spectrometer over the frequency range 8.8 GHz to 15 GHz and assigned for the first time. The complete nuclear quadrupole coupling (NQC) tensors for both iodine nuclei were obtained for the $^{28}$ce{Si}, $^{29}$ce{Si}, and $^{30}$ce{Si} isotopologues of diiodosilane. In addition to the nuclear quadrupole coupling constants (NQCCs), rotational constants, centrifugal distortion constants, and nuclear-spin rotation constants were determined for each silicon isotopologue. Subtle, yet unmistakable, changes in the NQCCs of iodine upon isotopic substitution will be examined. A $r_0$ structure of diiodosilane was also fit via isotopic substitution, leading to the determination of bond lengths and angles: ce{Si-I} = 2.4236(19) AA, ce{Si-H} = 1.475(21) AA, $angle$(ce{I-Si-I}) = 111.27(13)$^{circ}$, and $angle$(ce{I-Si-H}) = 105.9(19)$^{circ}$. These results will be compared to the results of a previous gas electron diffraction study.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/97134
DOI
https://doi.org/10.15278/isms.2017.FB02
Copyright and License Information
Copyright 2017 W. Orellana

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Abstracts & Presentations - 2017 International Symposium on Molecular Spectroscopy PRIMARY