title: Interactions between Carboxylic Acids and Heteroaromatics: A Rotational Study of Formic Acid-Pyridine.
abstract: The rotational spectra of four isotopologues of the 1:1 complex between formic acid and pyridine show that the two units are linked together through a "classical" (OH···N) and a weak (CH···O) hydrogen bond. The molecular system appears quite rigid and no effects of the internal motions have been observed in the spectrum. The dissociation energy obtained from the centrifugal distortion by applying an approximate model, 39.8 kJ/mol, is quite similar to the ab initio value, 41.7 kJ/mol. Its relatively high value suggests a small charge transfer to take place.
authors.affiliation: Dipartimento di Chimica, "G. Ciamician" dell'Università , Via Selmi 2, I-40126 Bologna, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Spada
authors.affiliation: Dipartimento di Chimica, "G. Ciamician" dell'Università , Via Selmi 2, I-40126 Bologna, Italy.|College of Chemistry and Chemical Engineering, Chongqing University , Daxuechengnan Road 55, Chongqing, 401331, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Gou
authors.affiliation: Dipartimento di Chimica, "G. Ciamician" dell'Università , Via Selmi 2, I-40126 Bologna, Italy.
authors.forename: Barbara M
authors.initials: BM
authors.lastname: Giuliano
authors.affiliation: Dipartimento di Chimica, "G. Ciamician" dell'Università , Via Selmi 2, I-40126 Bologna, Italy.
authors.forename: Walther
authors.initials: W
authors.lastname: Caminati