Before revision: Electrochemical measurements show that TTF can be oxidized twice reversibly: TTF -> TTF+ + e- TTF+ -> TTF^2+ + e- Each dithiolylidene ring in TTF has 7π electrons: 2 for each sulfur atom, 1 for each sp2 carbon atom.
After revision: Electrochemical measurements show that TTF can be oxidized twice reversibly: Each dithiolylidene ring in TTF has 7π electrons: 2 for each sulfur atom, 1 for each sp2 carbon atom.