3-Methyl-2-pyrazolin-5-one — CAS 108-26-9

3-Methyl-2-pyrazolin-5-one (C4H6N2O, CAS 108-26-9) — a free educational 3D molecular model for teachers and students, by MolGod.org. Every atom carries its engraved element symbol, so no colour key is needed. Which rings can the class see in 3-Methyl-2-pyrazolin-5-one? The answer is one 5-membered ring, joined up by 13 bonds altogether (11 single and 2 double). Give each pair of students the model and a blank sheet: recording every engraved symbol should lead them to 4 C + 6 H + 2 N + 1 O, which is 13 atoms. Functional groups to find on the model: amide group (-CO-N<). Full record and more free models: https://molgod.org/molecule/108-26-9/?utm_source=sketchfab&utm_medium=referral&utm_campaign=edu-3d-models Licence & provenance: https://molgod.org/licenses/stl/108-26-9/ PubChem CID 7920 · InChIKey NHLAPJMCARJFOG-UHFFFAOYSA-N · MolGod ID MG_819-718-576-10 Required attribution (CC BY-SA 4.0): "3-Methyl-2-pyrazolin-5-one 3D model by MolGod.org — https://molgod.org/molecule/108-26-9/ — CC BY-SA 4.0"