The rotational spectrum of 4-hydroxy-pyridine 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 [DE = 7.97(4) MHz] the barrier to internal rotation V2 = 1513(10) cm-1 has been obtained.
Tautomeric equilibrium and hydroxyl group internal rotation in 4-hydroxy-pyridine
GIULIANO, BARBARA MICHELA;MELANDRI, SONIA;CAMINATI, WALTHER
2006
Abstract
The rotational spectrum of 4-hydroxy-pyridine 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 [DE = 7.97(4) MHz] the barrier to internal rotation V2 = 1513(10) cm-1 has been obtained.File in questo prodotto:
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