The C=C double bond in ethene is involved in the polymerisation reaction. It allows ethene molecules to join, so it is an example of an addition reaction>. Poly(ethene) is an addition polymer.

When chemists develop new types of reactions, they generate a lot of ... palladium catalyst ligand, base, and the addition of an isoxazole (Science 2018, DOI: 10.1126/science.aar5169).

Synthetic organic and organometallic chemistry must go through reaction workup and characterization ... and single-crystal X-ray chromatography. In addition, new products require additional ...