THE MICROWAVE SPECTRUM AND STRUCTURE OF THE TRIMETHYLAMINE-WATER COMPLEX

Abstract

A microwave spectrum of the trimethylamine-water complex consisting of six transitions has been observed using a Fourier-transform microwave spectrometer. A symmetric top spectrum has been observed with $B_{0} = 2508.640(1)$ MHz. Using a diatomic approximation, the center-of-mass separation is estimated to be 3.8 {\AA}. The nuclear quadrupole hyperfine structure arising from the $^{14}N$ nucleus was assigned and fit to $X_{aa} = -5.015 (3)$ MHz. The second order Stark splittings of the $3_{0}-2_{0}$ transition of the $^{15}N$ isotopomer were used to calculate $\mu = 2.37 (1)$ D. Symmetric top spectra of the $D_{2}O$ and HDO complexes with both $^{14}N-$ and $^{15}N$-trimethylamine have also been observed.