Abstract

This dataset contains the experimentally observed rotational transition frequencies of isolated 2'-hydroxyacetophenone (2HA), recorded in two spectral regions: (i) 2-8 GHz using chirped-pulse Fourier-transform microwave (CP-FTMW) spectroscopy in a pulsed supersonic jet and (ii) 59.6-74.4 GHz using free-jet absorption Stark-modulated millimeter-wave spectroscopy. The spectroscopic analyses were performed with both the CALPGM suite and the XIAM program using Hamiltonians based on the semirigid rotor formalism (Watson's S-reduction in the I-r representation) supplemented with terms accounting for methyl-group internal rotation.