Molecule of the Month
|Nucleobase-Fluorobenzene Interactions: Hydrogen Bonding Wins over p-Stacking|
The relative importance of H-bonding and p-stacking in isolated cold complexes of 2-pyridone (2PY) with 1,2,4,5-tetrafluorobenzene (4FB), pentafluorobenzene (5FB), and hexafluoro-benzene (6FB) was investigated. Unexpectedly, only 2PY•6FB exhibits p-stacking in the gas phase and a broad UV spectrum. The other 2PY•nFB complexes show narrow absorption spectra characteristic of doubly H-bonded dimers.
This work was carried out in the group of Prof. Samuel Leutwyler.