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Millimeterwave Spectral Studies of Propynal (HCCCHO) Produced by DC Glow Discharge and Ab Initio DFT Calculation
Author(s) -
A.I. Jaman,
Rangana Bhattacharya,
Debasish Mandal,
Abhijit K. Das
Publication year - 2011
Publication title -
journal of atomic molecular and optical physics
Language(s) - English
Resource type - Journals
eISSN - 1687-9236
pISSN - 1687-9228
DOI - 10.1155/2011/439019
Subject(s) - microwave , ab initio , dipole , glow discharge , hamiltonian (control theory) , rotational temperature , chemistry , analytical chemistry (journal) , ground state , atomic physics , nuclear magnetic resonance , spectral line , physics , mathematics , plasma , quantum mechanics , mathematical optimization , organic chemistry , chromatography
The ground-state () millimeterwave rotational spectrum of propynal (HCCCHO) produced by a DC glow discharge through a low-pressure (~10–20 mTorr) flow of propargyl alcohol (HCCCH2OH) vapor has been observed in the frequency region: 36.0–94.0 GHz. Measured rotational transition frequencies along with the previously reported microwave and millimeterwave transitions were fitted to a standard asymmetric-top Hamiltonian to determine an improved set of rotational and centrifugal distortion constant. Detailed DFT calculations were also carried out with various functional and basis sets to evaluate the spectroscopic constants, dipole moment, and various structural parameters of propynal and compared with the corresponding experimental values.

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