Propylene 3D Molecular Model — CAS 115-07-1

Propylene (C3H6, CAS 115-07-1) — a free educational 3D molecular model for teachers and students, by MolGod.org. No legend required: the element symbol is engraved on each atom.

On a typical printed molecule every sphere is the same anonymous ball, since the STL file cannot transmit the usual colour convention. MolGod models carry the chemical symbol on every ball as an engraving, which survives slicing, printing and handling. MolGod's aim is to make the first step of reading a molecule, recognising its atoms, faster for students, so that bonding and geometry become the focus. Instead of building a model from scratch, a teacher can go straight from the molecule's name to a file in the slicer. Background, references and the planned classroom study: How the engraved atom letters are designed.

An acyclic molecule to start with: Propylene joins 9 atoms through 8 bonds (7 single and 1 double), and students will not find a ring. Use the engraved letters like a register: call out each element and tick it off until the class reaches 3 C + 6 H (9 atoms altogether). This molecule gives students these functional groups to identify: carbon-carbon double bond (C=C). Its closest structural relatives in the MolGod.org collection are Methyl vinyl ether (CAS 107-25-5) and Chloro(dimethyl)vinylsilane (CAS 1719-58-0); 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.

Part of the MolGod.org free library of engraved molecules for chemistry classrooms. Teachers: hand out printed copies and ask students to rebuild the structural formula from the model.

Print it, hand it round and build a lesson around it. Sharing it somewhere? The licence (CC BY-SA 4.0) needs four things: "MolGod.org" credited as the creator, links to the original and to the licence, a mention of any changes, and adaptations released under the same licence. The attribution text below covers the first two. Nothing else is needed: no account, no cost, no compulsory feedback. Your opinion really matters to us: post a comment with your review, your print photos or your classroom ideas, and tell us how to improve our educational molecules. Contact: Write to the MolGod team. Let's talk chemistry! Ask anything about this structure in the comments, and other teachers are warmly invited to share their lesson ideas. Missing a compound for your lesson? Give us the CAS number and we are happy to create its 3D model.

Full record and more free models: Propylene, CAS 115-07-1: structure, properties and 3D viewer
Licence & provenance: Licence record for this Propylene model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Propylene-3D-molecular-model-engraved-CAS-115-07-1.stl
Plain-text record for AI assistants: Propylene data sheet in plain text for LLMs
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23670730

A ball-and-stick model of Propylene 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: 101,484 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Propen (de); propène (fr); propilene (it); propeen (nl); propen (pl); 丙烯 (zh).

Chemical identity

• CAS Registry Number: 115-07-1

• Molecular formula: C3H6

• Molar mass: 42.08 g/mol (exact mass 42.0469501914)

• IUPAC name: prop-1-ene

• MolGod ID: MG_338-554-221-88 (Permanent MolGod record MG_338-554-221-88)

• PubChem CID: 8252 (https://pubchem.ncbi.nlm.nih.gov/compound/8252)

• Wikidata: Q151324 (https://www.wikidata.org/wiki/Q151324)

• EC number: 204-062-1

• ChemSpider ID: 7954

• InChIKey: QQONPFPTGQHPMA-UHFFFAOYSA-N

• SMILES: CC=C

Required attribution (CC BY-SA 4.0): "Propylene 3D model by MolGod.org — https://molgod.org/molecule/115-07-1/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/