Author/Authors :
Sanchez، نويسنده , , Raquel and Giuliano، نويسنده , , B. Michela and Melandri، نويسنده , , Sonia and Caminati، نويسنده , , Walther، نويسنده ,
Abstract :
The rotational spectrum of 4-hydroxypyridine has been investigated by free jet absorption millimeter-wave spectroscopy. Only the enolic form is observed. All transitions are split into two component lines due to the internal rotation of the hydroxyl group. From the ground state splitting (ΔE = 7.97(4) MHz) the barrier to internal rotation V2 = 1513(10) cm−1 has been obtained.
