Study of the conformational equilibrium of 1-chlorobutane by free-jets and conventional microwave spectroscopy

The microwave spectrum of 1-chlorobutane has been investigated with a free-jet millimetre wave spectrometer in the frequency range 60-78 GHz. Additional information has been obtained using a conventional spectrometer in the frequency range 28-40 GHz. The rotational spectra have been assigned to three conformers.