Warfarin 3D Molecular Model — CAS 81-81-2

Warfarin (C19H16O4, CAS 81-81-2) — a free educational 3D molecular model for teachers and students, by MolGod.org. Instead of colour coding, every sphere carries its engraved element symbol. Start with the ring system: Warfarin has three 6-membered rings, with one pair of rings fused along a shared edge, two of them aromatic; in total the model carries 41 bonds (27 single, 3 double and 11 aromatic, drawn in Kekulé form). Quick starter: ask students to count the engraved symbols (19 C + 16 H + 4 O) and check that they add up to 39 atoms and the formula C19H16O4. Team task: with the model in hand, each group marks the ketone group (C=O) and the phenolic hydroxyl group (Ar-OH), then writes down what they found. Warfarin brings one stereocentre without an assigned R/S label: a good prompt for discussing enantiomers. Worth bringing out when the syllabus reaches aromaticity and delocalised electrons, chirality, enantiomers and CIP (R/S) rules, fused ring systems, the carbonyl group (C=O), as well as phenols and hydrogen bonding. Part of the MolGod.org free library of engraved molecules for chemistry classrooms. Teachers: print one per group and let students check the structure against the formula. Full record and more free models: https://molgod.org/molecule/81-81-2/?utm_source=thingiverse&utm_medium=referral&utm_campaign=edu-3d-models Licence & provenance: https://molgod.org/licenses/stl/81-81-2/ Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Warfarin-3D-molecular-model-engraved-CAS-81-81-2.stl A ball-and-stick model of Warfarin with each element symbol recessed into its atom sphere, generated by MolGod.org from a PubChem-computed 3D conformer (not an experimental crystal structure); atomic coordinates and connectivity are unchanged. STL mesh: 507,486 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer. Names in other languages: (RS)-Warfarin (de); (RS)-warfarine (fr); Warfarine (nl); (RS)-warfaryna (pl); 华法林 (zh). Chemical identity - CAS Registry Number: 81-81-2 - Molecular formula: C19H16O4 - Molar mass: 308.3 g/mol (exact mass 308.10485899) - IUPAC name: 4-hydroxy-3-(3-oxo-1-phenylbutyl)chromen-2-one - MolGod ID: MG_834-796-691-63 (https://molgod.org/id/MG_834-796-691-63) - PubChem CID: 54678486 (https://pubchem.ncbi.nlm.nih.gov/compound/54678486) - Wikidata: Q407431 (https://www.wikidata.org/wiki/Q407431) - ChemSpider ID: 10442445 - InChIKey: PJVWKTKQMONHTI-UHFFFAOYSA-N - SMILES: CC(=O)CC(C1=CC=CC=C1)C2=C(C3=CC=CC=C3OC2=O)O

Required attribution (CC BY-SA 4.0): "Warfarin 3D model by MolGod.org — https://molgod.org/molecule/81-81-2/ — CC BY-SA 4.0" Licence text: https://creativecommons.org/licenses/by-sa/4.0/