Forbidden Rotational Transitions in the Microwave Spectrum of the Trans-Conformer of the Isopropyl Alcohol Molecule
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Forbidden transitions are found in the microwave rotational spectrum of the trans-conformer of the (CH3)2CHOH molecule at frequencies of 25,900–78,060 MHz. Components μb and μc of a dipole moment are found in the symmetry plane of this molecule, while the component μa = 0. In molecules of this type, an induced component of the dipole moment μa perpendicular to the symmetry plane of the molecule is generated by centrifugal perturbations. This leads to the appearance of rotational transitions that are forbidden in the rigid top model. Forbidden "centrifugal" transitions of the trans-conformer of the (CH3)2CHOH molecule are detected. 70 forbidden μa-transitions with rotational quantum numbers up to and including J = 35 have been identifi ed.
Keywordsmicrowave rotational spectrum forbidden transition spectroscopic parameters centrifugal distortion isopropyl alcohol
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