Rotational Spectrum of Eugenol As Analyzed with Double Resonance and Grid-Based Autofit

The
molecule eugenol was extracted from cloves via steam-distillation,
and its rotational spectrum from 3–18 GHz was acquired with
a chirped-pulsed Fourier transform microwave spectrometer. This spectrum
was analyzed via two separate methods in parallel, one employing several
microwave–microwave double resonance measurements and the other
using a newly written version of the Autofit program. Both methods
yielded rotational constants in excellent agreement with predictions
from ab initio calculations. The relative merits of the different
analysis methods are discussed.