Rapid capture of large amplitude motions in 2,6-difluorophenol: High-resolution fast-passage FT-MW technique

► A new design of broadband IMPACT-FT-MW spectrometer is briefly presented. ► Linewidth in order of the COBRA-FT-MW experiment can be reached. ► Spectroscopic constants of 2,6-difluorophenol are determined. ► Tunneling splitting and the Coriolis coupling constant are studied.