title: Frontiers in rotational spectroscopy: shapes and tunneling dynamics of the four conformers of the acrylic acid--difluoroacetic acid adduct.
abstract: The rotational spectra of four conformers of the acrylic acid-difluoroacetic acid adduct (CH2 =CHCOOH-CHF2 COOH, AA-DFA) are reported and information on their internal dynamics is supplied. This represents an unprecedented result for the conformational analysis, with microwave spectroscopy, of such a heavy molecular adduct.
authors.affiliation: Department of Chemistry, University of Bologna, Via Selmi 2, 40126 Bologna (Italy).
authors.forename: Gang
authors.initials: G
authors.lastname: Feng
authors.forename: Qian
authors.initials: Q
authors.lastname: Gou
authors.forename: Luca
authors.initials: L
authors.lastname: Evangelisti
authors.forename: Walther
authors.initials: W
authors.lastname: Caminati
keywords: Ubbelohde effect; conformation analysis; hydrogen bonds; internal dynamics; rotational spectroscopy; supersonic expansions