𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Infrared and Millimeter-Wave Study of the Four Lowest Torsional States of CH3CF3

✍ Scribed by S.-X. Wang; J. Schroderus; I. Ozier; N. Moazzen-Ahmadi; A.R.W. McKellar; V.V. Ilyushyn; E.A. Alekseev; A.A. Katrich; S.F. Dyubko

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
507 KB
Volume
205
Category
Article
ISSN
0022-2852

No coin nor oath required. For personal study only.

✦ Synopsis

An investigation of the torsion-rotation Hamiltonian of CH 3 CF 3 in the ground vibrational state has been carried out using infrared and mm-wave spectroscopy. With infrared Fourier transform spectroscopy, the weak, torsional overtone (v 6 ϭ 2 4 0) has been studied leading to the measurement of 382 frequencies between 405 and 440 cm Ϫ1 at a resolution of 0.005 cm Ϫ1 . Torsional splittings on the order of 0.03 cm Ϫ1 were observed. With mm-wave methods, a total of 669 rotational transitions between 50 and 360 GHz have been measured at Doppler-limited resolution in the four lowest torsional states v 6 ϭ 0, 1, 2, 3. The experimental uncertainty attained for an isolated line was better than 10 kHz below 150 GHz, and somewhat larger at higher frequencies. For v 6 ϭ 3, torsional splittings as large as 8.7 MHz were observed. The global data set consisted of the current frequency determinations and the 443 measurements with molecular beam, microwave, and mm-wave methods analyzed by I. Ozier, J. Schroderus, S.

📜 SIMILAR VOLUMES

Vibration–Torsion–Rotation Study of the
Vibration–Torsion–Rotation Study of the ν5 State of CH3CF3
✍ S.-X. Wang; J. Schroderus; I. Ozier; N. Moazzen-Ahmadi; V.-M. Horneman; V.V. Ily 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 296 KB

An investigation of the torsion-rotation-vibration energies in the ν 5 vibrational state in CH 3 CF 3 has been carried out using infrared and mm-wave spectroscopy. The lowest frequency parallel fundamental band ν 5 near 600 cm -1 has been measured at a resolution of 0.00125 cm -1 with Fourier transf

Infrared and millimeter-wave studies of
Infrared and millimeter-wave studies of 13CH3Cl in the ground, 31, and 61 states
✍ M. Litz; H. Bürger; L. Féjard; F.L. Constantin; L. Margulès; J. Demaison 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 224 KB

The monoisotopic methyl chloride species 13 CH 3 35 Cl and 13 CH 3 37 Cl were synthesized and investigated by high-resolution (ca. 2:5 Â 10 À3 cm À1 ) infrared (J max ¼ 63) and millimeter-wave spectroscopy (J max ¼ 50). Ground state parameters up to sextic centrifugal distortion constants have been

The Millimeter- and Submillimeter-Wave R
The Millimeter- and Submillimeter-Wave Rotational Spectrum of CH3CF3: Observation of the K = 3 Splitting
✍ R. Bocquet; J. Burie; W.D. Chen; G. Wlodarczak; J. Demaison 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 309 KB

The ground state rotational spectrum of \(\mathrm{CH}_{3} \mathrm{CF}_{3}\) was measured from \(190 \mathrm{GHz}, J=18\), up to \(910 \mathrm{GHz}, J=87\) and \(K=63\). These measurements allow us to determine accurate molecular constants, including the three sextic centrifugal distortion constants:

High-Resolution Infrared and Millimeter-
High-Resolution Infrared and Millimeter-Wave Study of the v3 = 1 State of HSiF3 and DSiF3
✍ H. Bürger; E.B. MKadmi; J. Demaison; L. Margulès; M. Gnida 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 183 KB

Millimeter-wave spectra of HSiF 3 and DSiF 3 in the v 3 ϭ 1 excited state have been measured from 100 to 490 GHz. Infrared spectra have been recorded in the 3 regions, 0 424.0301 and 420.9320 cm Ϫ1 in HSiF 3 and DSiF 3 , respectively, with a resolution of 2.4 ϫ 10 Ϫ3 cm Ϫ1 . Since in both species th

The Millimeter-Wave Rotational Spectrum
The Millimeter-Wave Rotational Spectrum of CF3CN in Excited Vibrational States
✍ John H. Carpenter; Masoud Motamedi; John G. Smith 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 315 KB

The millimeter-wave rotational spectra of the excited vibrational states £ 4 Å 1, £ 7 Å 1, and £ 8 Å 1 of the symmetric top species trifluoroacetonitrile, CF 3 CN, have been recorded and analyzed for JЉ Å 16 up to JЉ Å 32. The parameters obtained have been used to provide further information on the