Gauche Effect in 1,2-Difluoroethane. Hyperconjugation, Bent Bonds, Steric Repulsion Goodman, Lionel ; Gu, Hongbing ; Pophristic, Vojislava Abstract Publication: Journal of Physical Chemistry A Pub Date: February 2005 DOI: 10.1021/jp046290d Bibcode: 2005JPCA..109.1223G