title: The C-F small middle dot small middle dot small middle dotH-C "Anti-Hydrogen Bond" in the Gas Phase: Microwave Structure of the Difluoromethane Dimer.
abstract: A shortening of the C-H bond lengths and a blue shift of the C-H stretching frequencies for the C-F small middle dot small middle dot small middle dotH-C groups indicates that anti-hydrogen bonds are present the difluoromethane dimer. The most stable conformer has three such interactions (shown schematically).
authors.affiliation: Dipartimento di Chimica "G. Ciamician" dell'Università, Via Selmi 2, I-40126 Bologna (Italy).
authors.initials: W
authors.lastname: Caminati
authors.initials: S
authors.lastname: Melandri
authors.initials: P
authors.lastname: Moreschini
authors.initials: PG
authors.lastname: Favero