By making use of a novel diastereotopicity probe, namely C(CF3)2OH, it has been possible to measure by very low temperature 19F NMR spectroscopy the elusive aryl–aryl rotation barriers of biphenyls bearing an OH or F group in one ortho position. The experimental values (5.4 and 4.4 kcalmol-1, respectively) are matched by those from ab initio calculations (5.3 and 4.3 kcalmol-1, respectively).
The Torsional Barriers of 2-Hydroxy- and 2-Fluorobiphenyl: Small but Measurable / A. Mazzanti; L. Lunazzi; R. Ruzziconi; S. Spizzichino; M. schlosser. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - STAMPA. - 16:(2010), pp. 9186-9192. [10.1002/chem.200903372]
The Torsional Barriers of 2-Hydroxy- and 2-Fluorobiphenyl: Small but Measurable
MAZZANTI, ANDREA;LUNAZZI, LODOVICO;
2010
Abstract
By making use of a novel diastereotopicity probe, namely C(CF3)2OH, it has been possible to measure by very low temperature 19F NMR spectroscopy the elusive aryl–aryl rotation barriers of biphenyls bearing an OH or F group in one ortho position. The experimental values (5.4 and 4.4 kcalmol-1, respectively) are matched by those from ab initio calculations (5.3 and 4.3 kcalmol-1, respectively).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
