title: Ring inversion dynamics of derivatives of thianthrene di- and tetraoxide.
abstract: The ring inversion barrier for thianthrene tetraoxide was determined by making use of the variable temperature 13C NMR spectra of the 2,7-diisopropyl derivative (DeltaG(double dagger) = 6.5 kcal mol(-1)). The barrier is lower than that measured for a trans thianthrene dioxide derivative (DeltaG(double dagger) = 9.35 kcal mol(-1)). These results agree well with ab initio theoretical predictions.
authors.affiliation: Department of Chemistry, University of Basilicata, Potenza, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Casarini
authors.forename: Carmine
authors.initials: C
authors.lastname: Coluccini
authors.forename: Lodovico
authors.initials: L
authors.lastname: Lunazzi
authors.forename: Andrea
authors.initials: A
authors.lastname: Mazzanti
mesh_terms: D006571:Heterocyclic Compounds / Q000737:chemistry*; D008745:Methylation; D008958:Models, Molecular; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D013696:Temperature
chemical_list: D006571:Heterocyclic Compounds; D010087:Oxides; C009449:thianthrene