The millimeter-wave spectra of the HCCCO and DCCCO radicals

The bent-chain radicals HCCCO and DCCCO have been identified from laboratory measurements of pure rotational transitions between 81 and 400 GHz, sampling K a = 0 through 3. The spectral frequencies have been fitted to an S-reduced effective Hamiltonian, incorporating the spin-rotation interaction, w...

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Bibliographic Details
Published in:Journal of molecular spectroscopy 1992-05, Vol.153 (1), p.610-626
Main Authors: Cooksy, A.L., Watson, J.K.G., Gottlieb, C.A., Thaddeus, P.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Physics
Properties of molecules and molecular ions
Rotation, vibration and vibration-rotation constants
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Summary:The bent-chain radicals HCCCO and DCCCO have been identified from laboratory measurements of pure rotational transitions between 81 and 400 GHz, sampling K a = 0 through 3. The spectral frequencies have been fitted to an S-reduced effective Hamiltonian, incorporating the spin-rotation interaction, with distortion terms up to 8th-order in N. The spectroscopic constants so determined indicate that HCCCO and DCCCO are highly prolate asymmetric tops with considerable coupling between bending vibrations and rotation about the a-axis. A preliminary discussion of the structure is presented.
ISSN:0022-2852
1096-083X
DOI:10.1016/0022-2852(92)90497-C