title: 1,2-Difluoroethane: the angular dependance on 1J(CF) coupling constants is independent of hyperconjugation.
abstract: 1,2-Difluoroethane is widely recognised to adopt a lower energy gauche rather than anti conformation; this gauche effect has its origin in hyperconjugation; however, surprisingly the (1)J(CF) coupling constant is not influenced by hyperconjugation; instead, its magnitude changes with the overall molecular dipole.
authors.affiliation: Departamento de Química, Universidade Federal de Lavras, Lavras, Brazil - MG -C.P. 303737200-000.
authors.forename: Matheus P
authors.initials: MP
authors.lastname: Freitas
authors.forename: Michael
authors.initials: M
authors.lastname: Bühl
authors.forename: David
authors.initials: D
authors.lastname: O'Hagan