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

Orellana, W.

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

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

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

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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