Abstract

Pulsed molecular beam Fourier transform microwave spectroscopy has been used in order to remove disagreements in previous assignments of the rotational spectra of (chloromethyl)cyclopropane and (chloromethyl)oxirane. For the latter, two rotameric forms have been detected in a supersonic jet. It has been possible to determine, in addition to the rotational and quartic centrifugal distortion constants, the complete chlorine quadrupole coupling tensors including all of their off-diagonal elements for the 35Cl and 37Cl isotopomers of all gauche conformers. From these data, modified plausible structures could be deduced. These findings are supported by the results of quantum chemical calculations.

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