15min:

C. S. BRAUER, M. B. CRADDOCK, E. M. GRUMSTRUP AND K. R. LEOPOLD, Department of Chemistry, University of Minnesota, Minneapolis, MN 55455; M. C. ORILALL, Department of Chemistry, Concordia University, Moorhead, MN 56562.

Amine hydrogen halide complexes are prototypical systems in which to study the transfer of a proton across a hydrogen bond. We report the results of Stark effect experiments using a pulsed nozzle Fourier transform microwave spectrometer to determine the dipole moments of: H₃¹⁵N-H³⁵Cl (4.05865 \pm0.00095 D), (CH₃)₃¹⁵N-H³⁵Cl (7.129 \pm0.014 D), H₃¹⁵N-H⁷⁹Br (4.2577 \pm0.0022 D), and (CH₃)₃¹⁵N-H⁷⁹Br (8.396 \pm0.013 D). The results will be discussed in terms of the degree of proton transfer, as previously elucidated by Legon and coworkers and should be of interest in view of a large body of matrix isolation work in which the interaction between the complex and the host matrix has been investigated.