Journal of Physical Chemistry A, Vol.106, No.16, 4022-4027, 2002
High-resolution electronic spectra of 2-hydroxy and 2-aminopyridine. Perturbing effects of the nitrogen atom in the aromatic ring
High resolution. rotationally resolved electronic spectra of 2-hydroxypyridine (2HP) and 2-aminopyridine (2AP, at similar to277 and similar to299 nm, respectively) have been observed and fit using rigid-rotor Hamiltonians to within lifetime-limited resolutions of 170 and 120 MHz. respectively. The derived values of the rotational constants are very similar to those of phenol and aniline. However, 2HP and 2AP each exhibit inertial axis tilting, large rotations of their SI-So electronic transition moments, and intramolecular hydrogen bonds, making them very different from their hydrocarbon analogues. Possible reasons for this behavior are discussed.