TY - JOUR AU - Gunion, R AU - Koppel, H AU - Leach, G AU - Lineberger, W C2 - Journal of Chemical Physics DA - 1995-01-01 LA - en M1 - 103 PB - Journal of Chemical Physics PY - 1995 TI - Photoelectron spectroscopy of C4H4-: Ab initio calculations and dynamics of the 1,2-hydrogen shift in vinylvinylidene ER -