Rotational spectra of t-shaped cyanoacetylene – carbon dioxide complex, HCCCN - CO2

Dorell, Ian

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https://hdl.handle.net/2142/91276 Copy

Description

Title

Rotational spectra of t-shaped cyanoacetylene – carbon dioxide complex, HCCCN - CO2

Author(s)

Dorell, Ian

Contributor(s)

• Novick, Stewart E.
• Kukolich, Stephen G.
• Oncer, Onur
• Davis, Philip
• Kang, Lu

Issue Date

2016-06-22

Keyword(s)

Spectroscopy of Large Amplitude Motions

Abstract

The rotational spectra of T-shaped cyanoacetylene carbon dioxide complex, HCCCN --- CO$_{2}$, were measured using two Balle-Flygare type Fourier transform microwave (FTMW) spectrometers between 1.4 GHz and 22 GHz. The low J transitions were recorded using the low frequency FTMW spectrometer at the University of Arizona with a state-of-the-art resolution of “full width at half maximum” (FWHM) ~1 kHz. The spectra above 4 GHz were recorded at Wesleyan University. Spectral hyperfine structures due to the $^{14}$N nuclear quadrupole coupling interactions can be fully resolved in low frequency bands. Since all K$_{a}$ = 1 branches were not observed, this implies that HCCCN --- CO$_{2}$ possesses a rigorous T-shaped structure. Assuming that A$_{0}$ is the same as that of HCN --- CO$_{2}$, 11824 MHz, the spectroscopic constants of HCCCN --- CO$_{2}$ are: B$_{0}$ = 794.59686(63) MHz, C$_{0}$ = 715.74488(60) MHz, $\Delta$$_{J}$ = 0.50067(18) kHz, $\Delta$$_{JK}$ = 120.892(12) kHz, $\delta$$_{J}$ = 0.04253(31) kHz, $\delta$$_{K}$ = 65.32(12) kHz, H$_{J}$ = -0.00117(33) Hz, H$_{JK}$ = 0.034876(21) kHz, H$_{KJ}$ = -0.68254(73) kHz, $\chi$$_{aa}$($^{14}$N) = -4.12873(78) MHz, $\chi$$_{bb}$($^{14}$N) = 2.110(25) MHz, and $\chi$$_{cc}$($^{14}$N) = 2.019(25) MHz.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

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http://hdl.handle.net/2142/91276

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Copyright 2016 by the authors

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