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RICHARD J. LAVRICH, JABARI O. FARRAR AND MICHAEL J. TUBERGEN, Department of Chemistry, Kent State University, Kent, OH 44242.

We report the rotational spectra of alaninamide and two ¹⁵N labeled isotopomers. The derived rotational constants of the most abundant isotopomer are A = 4931.924 (2) MHz, B = 3114.594 (2) MHz, and C = 2297.252 (2) MHz. Fifty-two hyperfine components associated with 3 a -type and 3 b -type transitions were fit yielding quadrupole coupling constants of \chi_aa = 1.603 (4) MHz and \chi_bb = 0.643 (6) MHz for the amino nitrogen and \chi_aa = 1.379 (5) MHz and \chi_bb = 0.570 (6) MHz for the amide nitrogen. A preliminary Kraitchman calculation indicates a nitrogen-to-nitrogen distance of 2.803 Å, suggesting that the experimentally determined conformer contains an intramolecular hydrgoen bond from the amide nitrogen to the amino nitrogen.