HYDROGEN BONDING TO DIMETHYLAMINE: THE MICROWAVE SPECTRUM AND STRUCTURE OF THE DIMETHYLAMINE-WATER COMPLEX
Loading...
Date
1994
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Rotational transitions have benn observed for four isotopomers of the dimethylaminewater complex using a Fourier-transform microwave spectrometer. Both a-and c-type transitions were observed. The rotational constants of the four isotopomers are consitstent with a structure in which the water acts as a hydrogen bond donor to the dimethylamine $(R_{N}.O=2.83 {\AA})$. The dipole moment is 2.78 (1)D, and its projections on the principal inertial axes are: $\mu_{a} = 2.38 (1) D, \mu_{b} = 0.1 (2) D_{1}$ and $\mu_{c} = 1.42 (1) $D. The $^{14}N$ and $^{17}O$ nuclear quadrupole coupling constants were measured and their projections onto the interial axes are compared to predictions based on structural models. Evdidence for a nearly free internal rotation will also be discussed.
Description
Author Institution: Department of Chemistry, University of Michigan