Linuron Molecule 3D Model with Engraved Atoms - Chemistry Teaching Aid (CAS 330-55-2)

Linuron molecular model (C9H10Cl2N2O2, CAS 330-55-2): a free, print-ready ball-and-stick model with the element symbol engraved on every atom, designed for chemistry lessons.

At its heart, Linuron is built around one aromatic 6-membered ring. The model shows 25 bonds: 18 single, 1 double and 6 aromatic, drawn in Kekulé form. Use the engraved letters like a register: call out each element and tick it off until the class reaches 9 C + 10 H + 2 Cl + 2 N + 2 O (25 atoms altogether). For intermolecular forces: the molecule has 1 hydrogen-bond donor and 2 acceptors (computed). Name-and-locate exercise: students find the urea linkage (-N-CO-N-) and the two C-Cl bonds on the model and afterwards write the name of every group they found. Topics it supports in class: aromaticity and delocalised electrons, the carbonyl group (C=O), as well as organohalogen compounds and carbon-halogen bonds.

Printing: the STL is in angstrom units - scale it 10x in the slicer (1 angstrom = 10 mm). Use supports under the bonds; PLA works well.

Full data, safety notes and other formats: https://molgod.org/molecule/330-55-2/

Licence and provenance: https://molgod.org/licenses/stl/330-55-2/

MolGod ID: MG_290-797-782-17

Also published on: NIH 3D https://3d.nih.gov/entries/3DPX-023719 · Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23277249 · Figshare (dataset DOI) https://doi.org/10.6084/m9.figshare.34439148

Atomic coordinates: PubChem computed 3D conformer; mesh generated by MolGod's own software. Licence: CC BY-SA 4.0, MolGod.org.