scholarly journals The pure rotational spectrum of the T-shaped AlC2 radical (X̃2A1)

2018 ◽  
Vol 20 (16) ◽  
pp. 11047-11052 ◽  
Author(s):  
D. T. Halfen ◽  
L. M. Ziurys
Keyword(s):  
Fourier Transform ◽  
Millimeter Wave ◽  
Rotational Spectrum ◽  
Frequency Range

The pure rotational spectrum of the AlC2 radical (X̃2A1) has been measured using Fourier transform microwave/millimeter-wave (FTMmmW) techniques in the frequency range 21–65 GHz.

11B-Quadrupole Hyperfine Structure in the Rotational Spectrum of Phenyldifluoroborane

1989 ◽  
Vol 44 (1) ◽  
pp. 84-86 ◽  
Author(s):  
Kirsten Vormann ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Ground State ◽  
Rotational Spectrum ◽  
Frequency Range

Abstract We present an investigation and interpretation of the 11B-quadrupole hyperfine structure (hfs) in the rotational spectrum of phenyldifluoroborane in the torsional ground state of the BF2 group. The measurements were made with a microwave Fourier transform (MWFT) spectrometer in the frequency range between 5 and 8 GHz.

scholarly journals Millimeter-Wave Rotational Spectrum, Barrier to Internal Rotation, and DFT Calculation of o-Tolunitrile

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
A. I. Jaman ◽  
P. Hemant Kumar ◽  
P. R. Bangal
Keyword(s):  
Internal Rotation ◽  
Millimeter Wave ◽  
Dft Calculation ◽  
Rotational Spectrum ◽  
Frequency Range ◽  
Rotational Spectra ◽  
Calculation Results ◽  
Rotation Parameters ◽  
Experimental Values

The millimeter-wave rotational spectra of o-tolunitrile (C6H4CH3CN) have been investigated in the ground torsional state in the frequency range 50.0–75.0 GHz. Many high-J rotational lines with large A-E splitting due to internal rotation of the methyl top have been assigned. A least squares analysis of the A-E splitting of 92 transitions resulted in the determination of accurate values of internal rotation parameters. The observed parameters were compared with the previously reported experimental values and DFT calculation results.

Rotational Spectrum and 14N-Quadrupole Coupling Constants of Orthofluorobenzonitrile, a Microwave Fouriertransform Study

1986 ◽  
Vol 41 (7) ◽  
pp. 955-958 ◽  
Author(s):  
Olaf Böttcher ◽  
Dieter H. Sutter
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Vibrational State ◽  
Coupling Constants ◽  
Spectroscopic Constants ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Frequency Range ◽  
Rotational Constants ◽  
Quadrupole Coupling

Seventyseven a-type rotational transitions of Orthofluorobenzonitrile were observed and assigned in the 8 - 25 GHz frequency range. The spectrum was recorded using the high resolution microwave Fourier transform spectrometer constructed at Kiel University. For most transitions the l4N quadrupole hfs patterns could be fully resolved. The spectroscopic constants obtained by a fit to the observed hfs-center frequencies and to the observed hfs multiplet splittings are: A = 2940.745(12) MHz, B = 1512.699(1) MHz, C = 998.633(1) MHz (rotational constants) and Χaa = - 4.114( 17) MHz, Xbb - Xcc= 0.383(34) MHz (14N quadrupole coupling constants). The rotational spectrum of a low lying vibrational state could be also assigned.

The Rotational Spectrum and Nuclear Quadrupole Coupling of CH35C1F2

1996 ◽  
Vol 51 (1-2) ◽  
pp. 129-132 ◽  
Author(s):  
Susana Blanco ◽  
Alberto Lesarri ◽  
Juan C. López ◽  
José L. Alonso ◽  
Antonio Guarnieri
Keyword(s):  
Fourier Transform ◽  
Vibrational State ◽  
Frequency Region ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Frequency Range ◽  
Vibrational States ◽  
Ground Vibrational State ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract The rotational spectrum of CH35CIF2 in the ground vibrational state has been measured in the frequency range 8-18 GHz using a waveguide Fourier transform microwave (FTMW) spectrometer in order to determine accurate nuclear quadrupole coupling constants. The spectra of the excited vibrational states ν5 = 1, ν6 = 1 and ν9 = 1 have been also observed and analyzed in the frequency region 8-250 GHz using FTMW, Stark, and source modulation spectrometers. Quadrupole coupling constants are also reported for these states.

scholarly journals The Rotational Spectrum of Propane Centrifugal Distortion Analysis

1985 ◽  
Vol 40 (5) ◽  
pp. 508-510 ◽  
Author(s):  
G. Bestmann ◽  
H. Dreizler ◽  
J. M. Vacherand ◽  
D. Boucher ◽  
B. P. van Eijck ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Millimeter Wave ◽  
Ground State ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Astrophysical Interest ◽  
Distortion Analysis ◽  
Wave Spectrometer

The ground state rotational spectrum of propane has been investigated between 6.4 and 26.5 GHz with a microwave Fourier transform spectrometer and between 140 and 300 GHz with a millimeter-wave spectrometer. High J transitions have been measured and fitted to a centrifugally distorted Hamiltonian including some sextic coefficients. The results of the analysis are sufficiently accurate for the prediction of all strong transitions of astrophysical interest.

Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

2015 ◽  
Vol 12 (2) ◽  
pp. 13
Author(s):  
Muhamad Faridz Osman ◽  
Karimah Kassim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Ftir Spectroscopy ◽  
Coordination Complexes ◽  
Frequency Range ◽  
Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively. 

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