Naphthalene 3D Molecular Model — CAS 91-20-3

Naphthalene (C10H8, CAS 91-20-3) — a free educational 3D molecular model for teachers and students, by MolGod.org. Instead of colour coding, every sphere carries its engraved element symbol.

At its heart, Naphthalene is built around two 6-membered rings, fused along a shared edge, both aromatic. The model shows 19 bonds: 8 single and 11 aromatic. Hand the model round and let students tally the engraved atoms: 10 C + 8 H, 18 in total. Use it when you teach aromaticity and delocalised electrons, as well as fused ring systems. Its closest structural relatives in the MolGod.org collection are Anthracene (CAS 120-12-7) and 2-Methoxynaphthalene (CAS 93-04-9); printing them side by side makes a quick compare-and-contrast exercise. It has no hydrogen-bond donors or acceptors (computed), a useful contrast with alcohols and amines when you discuss intermolecular forces.

MolGod.org shares these models for free to make chemistry tangible in the classroom. Teachers: print one per group and let students check the structure against the formula.

Full record and more free models: https://molgod.org/molecule/91-20-3/?utm_source=myminifactory&utm_medium=referral&utm_campaign=edu-3d-models Licence & provenance: https://molgod.org/licenses/stl/91-20-3/ Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Naphthalene-3D-molecular-model-engraved-CAS-91-20-3.stl

A ball-and-stick model of Naphthalene 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: 245,598 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Naphthalin (de); naphtalène (fr); naftalene (it); naftaleen (nl); naftalen (pl); 萘 (zh).

Chemical identity - CAS Registry Number: 91-20-3 - Molecular formula: C10H8 - Molar mass: 128.17 g/mol (exact mass 128.062600255) - IUPAC name: naphthalene - MolGod ID: MG_511-082-366-87 (https://molgod.org/id/MG_511-082-366-87) - PubChem CID: 931 (https://pubchem.ncbi.nlm.nih.gov/compound/931) - Wikidata: Q179724 (https://www.wikidata.org/wiki/Q179724) - EC number: 202-049-5 - ChemSpider ID: 906 - InChIKey: UFWIBTONFRDIAS-UHFFFAOYSA-N - SMILES: C1=CC=C2C=CC=CC2=C1

Required attribution (CC BY-SA 4.0): "Naphthalene 3D model by MolGod.org — https://molgod.org/molecule/91-20-3/ — CC BY-SA 4.0" Licence text: https://creativecommons.org/licenses/by-sa/4.0/