Conformational landscape of supersonically expanded 1-(fluorophenyl)ethanols and their monohydrated clusters.
The effects of the presence of the ring fluorine atom on the conformational landscape of supersonically expanded isomeric 1-(fluorophenyl)ethanols and their monohydrated clusters are investigated by resonant two-photon ionization (R2PI) spectroscopy, coupled with time-of-flight (TOF) mass spectrometry. In contrast to the very simple spectrum of 1-phenylethanol, the lack of structural symmetry of the aromatic rings of isomeric 1-(fluorophenyl)ethanols generates more complicated spectra, characterized by several low-frequency progressions of bands. Their interpretation is based on the strict correspondence with theoretical predictions at the D-B3LYP/6-31G** level of theory. Monohydration of the 1-(fluorophenyl)ethanol isomers favours exclusive formation of the corresponding conformers, characterized by the O-H...O(w)-H...pi intracomplex interaction and whose excitation spectrum exhibits features attributed to the C(1)-C(alpha) torsion plus intermolecular water torsion.
Speranza
Maurizio
M
Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P. le Aldo Moro 5, 00185 Roma, Italy. maurizio.speranza@uniroma1.it
Rondino
Flaminia
F
Giardini
Anna
A
Paladini
Alessandra
A
Hortal
Ana R
AR
Piccirillo
Susanna
S
Satta
Mauro
M