PICOSECOND METHODS APPLIED TO A STRUCTURAL STUDY OF N-H...X HYDROGEN-BONDS - GEOMETRIES OF CARBAZOLE WATER AND CARBAZOLE AMMONIA BY ROTATIONAL COHERENCE SPECTROSCOPY

Rotational coherence spectroscopy has been applied to a structural stu dy of the N-H ... X hydrogen-bonded complexes carbazole-water and carb azole-ammonia. The rotational constants measured for these species pro vide information pertaining to the parameters of this important type o f hydrogen bond. For both species the results are consistent with a li near or near-linear hydrogen bond with ground-state N-H ... O and N-H ... N bond distances of 2.955 +/- 0.03 and 3.02 +/- 0.03 angstrom, res pectively.