Microwave spectrum, structure and dipole moment of 4-fluorophenylacetylene (4FPA)

Abstract

Using a chirped-pulse Fourier-transform microwave (CP-FTMW) spectrometer, a 6-18 GHz spectrum of 4-fluorophenylacetylene (4FPA) was measured and only a-type R-branch transitions were observed up to J = 9. Rotational constants and quartic centrifugal distortion constants for the normal isotopic species were determined based on Watson-S reduction: