Microwave spectrum, structure, and dipole moment of 3,3‐difluorocyclopropene

The microwave spectra of four isotopic species of 3,3‐difluorocyclopropene have been investigated in the region from 18–40 GHz. Structural parameters obtained are r (C1C2) =1.321±0.001, r (C1C3) =1.438±0.007, r (CH) =1.075±0.001 , r (CF) =1.365±0.005 Å, &FCF=105.5±0.5°, &C1C3C2=54.6±0.4°, &HC1C2=148.4±0.1°. From the Stark effect the dipole moment has been determined to be 2.98±0.02 D