Draw curved arrows for a reaction mechanism

Use the curved-arrow tool in the chemical drawing editor and practice electron pushing with Drawing Coach.

1. Open the structure editor and draw the species for the step you want to show. Make the electron source visible. A two-electron arrow can start on a lone pair or a bond, depending on the step.
2. Hold the arrow button below the plus sign in the editor and choose the curved arrow. Drag from the electron source to the atom or bond that receives the pair. Add the other arrows needed to describe the same step.
3. Check the arrow tails and heads against the products of that step, including any charge changes. Use the Drawing Coach lesson below for a guided exercise. For an arrow encoded in reaction SMILES, use the notation in the FAQ.