Drawing reactions
Figure 209 Two ”hooks” represents movement of two electrons.
Figure 210 One ”hook” represents movement of one electron.
Double-headed arrowsare used to represent equivalence between resonance structures.
Figure 211
Two-way double half arrowsare represent a reaction that can go forward or reverse. If
one of the half arrows is longer than the other it means that the reaction pathway favors
that direction with the longer arrow.