Pentane 3D Molecular Model — CAS 109-66-0
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Free educational pentane model (C5H12, CAS 109-66-0) with an engraved element symbol on every atom.
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Pentane (C5H12, CAS 109-66-0) — a free educational 3D molecular model for teachers and students, by MolGod.org. Element symbols are cut into each atom sphere: a self-labelled teaching aid.
Pentane has no rings at all: its 17 atoms form an open chain held together by 16 bonds (all of them single). Counting task: 5 C + 12 H gives 17 engraved spheres; can the class rebuild the formula C5H12 from the model alone? It makes saturated carbon chains and tetrahedral (sp3) carbon easier to see. Same formula, different structure: put it next to Isopentane (CAS 78-78-4) from the same collection and ask students what changed. Pair it with Hexane (CAS 110-54-3) and Tetracosane (CAS 646-31-1) from the same collection to compare closely related structures.
MolGod.org publishes its molecular models free of charge for teachers and students. Teachers: the engraved symbols let students work with the model without a separate key.
Full record and more free models: https://molgod.org/molecule/109-66-0/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/109-66-0/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Pentane-3D-molecular-model-engraved-CAS-109-66-0.stl
A ball-and-stick model of Pentane 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: 178,486 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.
Names in other languages: Pentan (de); n-pentane (fr); pentano (it); n-pentaan (nl); pentan (pl); 戊烷 (zh).
Chemical identity: CAS Registry Number 109-66-0 | Molecular formula C5H12 | Molar mass 72.15 g/mol | IUPAC name: pentane | MolGod ID MG_398-578-319-49 (https://molgod.org/id/MG_398-578-319-49) | PubChem CID 8003 | Wikidata Q150429 | EC number 203-692-4 | ChemSpider ID 7712 | InChIKey OFBQJSOFQDEBGM-UHFFFAOYSA-N | SMILES CCCCC
Required attribution (CC BY-SA 4.0): "Pentane 3D model by MolGod.org — https://molgod.org/molecule/109-66-0/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/