Mechanism Master
Draw the curved arrows yourself for SN1, SN2, E1, E2, Grignard and aldol, and watch the product form. Free online chemistry game, no signup.
About this game
Draw the curved arrows yourself for SN1, SN2, E1, E2, Grignard and aldol, and watch the product form. Eight mechanisms, 15 steps, three stars each.
It is free to play in your browser and does not need an account.
How to play
- Draw each curved arrow yourself: drag from a lone pair or a bond to the atom or bond the electrons move to.
- Press Check. Right arrows stay and wrong ones disappear, so you build the answer arrow by arrow. There is a hint, and the answer after two tries.
- When every arrow is right the electrons run along them and the molecule turns into the product, with a line on what each arrow did.
- Eight mechanisms and 15 steps, with up to three stars for each mechanism.
What you practice
Arrow pushing: where the electrons start and where they go in proton transfer, SN2, SN1, E2, E1, HBr addition to an alkene, the Grignard reaction and the aldol reaction.