A microwave free jet absorption spectrometer and its first applications

Melandri, Sonia; Camináti, Walther; Favero, Laura B.; Millemaggi, Aldo; Favero, Paolo G.

doi:10.1016/0022-2860(94)08516-k

Cited by 145 publications

(78 citation statements)

References 26 publications

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“…[18,19] The adducts were formed by flowing argon at room temperature at a pressure of about 0.7 bar over a solution of OXE and water, in a molecular ratio of 2:1. The mixture was then expanded to about 5.10 À3 mbar through a pulsed nozzle (repetition rate 5 Hz) with a diameter of 0.35 mm; the mixture reached an estimated ™rotational∫ temperature of about 10 K. Table 5.…”

Section: Resultsmentioning

confidence: 99%

Interactions Between Organic Molecules and Water: Rotational Spectrum of the 1:1 Oxetane–Water complex

Ottaviani

Giuliano

Velino

et al. 2004

Chemistry A European J

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The 1:1 molecular complex between oxetane and water has been investigated by using free-jet millimeter-wave spectroscopy. The rotational spectra of five isotopomers (with H(2)O, D(2)O, DOH, HOD and H(2) (18)O) have been assigned. Partial r(0) and r(s) structures of the complex have been derived. The water moiety lies in the plane of symmetry of oxetane, with the "free" hydrogen E with respect to the ring. The oxetane ring appears to be slightly nonplanar, with the C(beta) carbon tilted on the opposite side of the water unity. The three atoms involved in the hydrogen bond adopt a linear arrangement with an O(ring).H distance of about 1.86 A, and the angle between the COC bisector and the O(ring).H bond being congruent with 106 degrees. Additionally, quantum-chemical calculations for the complex were performed and were found to be in agreement with the experimental results.

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Section: Resultsmentioning

confidence: 99%

Interactions Between Organic Molecules and Water: Rotational Spectrum of the 1:1 Oxetane–Water complex

Ottaviani

Giuliano

Velino

et al. 2004

Chemistry A European J

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“…[20,30] The complex was formed by flowing neon at a pressure of about 1.5 bar over the sample at room temperature, and expanding the mixture through a pulsed nozzle (repetition rate 5 Hz) with a diameter of 0.35 mm, reaching an estimated rotational temperature of about 7 K. Neon 99.995 % was supplied by Linde, and pyrimidine by Aldrich. The accuracy of the frequency measurements is about 0.05 MHz.…”

Section: Discussionmentioning

confidence: 99%

Chemistry at Low Pressure and Low Temperature: Rotational Spectrum and Dynamics of Pyrimidine-Neon

Camináti

Favero

1999

Chem. Eur. J.

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The equilibrium configuration, dynamics, and dissociation energy of the very weakly bonded pyrimidine´´´Ne complex have been deduced from its free jet millimeter wave spectrum. The equilibrium distance of Ne with respect to the center of mass of the molecule is 3.27 , with Ne tilted 5.18 from the perpendicular to the center of mass of the ring toward the mid-point of the two nitrogen atoms. The dissociation energy is estimated, from the centrifugal distortion constant D J , to be about 1.3 kJ mol À1.

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“…[36] Experimental section Free-jet absorption millimeter-wave spectroscopy: The Stark-and pulsemodulated free-jet absorption millimeter-wave spectrometer used in this study has been described elsewhere. [18,19] The adducts were formed by allowing argon to flow, at room temperature and a pressure of ca. 0.7 bar, over a solution of THP and water in a 2:1 molar ratio.…”

Section: Discussionmentioning

confidence: 99%

Jet-Cooled Rotational Spectra and Ab Initio Investigations of the Tetrahydropyran-Water System

et al. 1998

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A microwave free jet absorption spectrometer and its first applications

Cited by 145 publications

References 26 publications

Interactions Between Organic Molecules and Water: Rotational Spectrum of the 1:1 Oxetane–Water complex

Interactions Between Organic Molecules and Water: Rotational Spectrum of the 1:1 Oxetane–Water complex

Chemistry at Low Pressure and Low Temperature: Rotational Spectrum and Dynamics of Pyrimidine-Neon

Jet-Cooled Rotational Spectra and Ab Initio Investigations of the Tetrahydropyran-Water System

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