Pentamidine 3D Molecular Model — CAS 100-33-4
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Free educational Pentamidine model (C19H24N4O2, CAS 100-33-4) with an engraved element symbol on every atom.
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Pentamidine (C19H24N4O2, CAS 100-33-4) — a free educational 3D molecular model for teachers and students, by MolGod.org. No legend required: the element symbol is engraved on each atom.
Which rings can the class see in Pentamidine? The answer is two 6-membered rings, both aromatic, joined up by 50 bonds altogether (36 single, 2 double and 12 aromatic, drawn in Kekulé form). Use the engraved letters like a register: call out each element and tick it off until the class reaches 19 C + 24 H + 4 N + 2 O (49 atoms altogether). Where on the model can students see the two ether linkages (C-O-C)? Let them search before you reveal the answer. Use it when you teach aromaticity and delocalised electrons. Its closest structural relatives in the MolGod.org collection are 4-Ethoxybenzoic acid (CAS 619-86-3) and Phenoxyethanol (CAS 122-99-6); printing them side by side makes a quick compare-and-contrast exercise.
MolGod.org shares these models for free to make chemistry tangible in the classroom. Teachers: pass the model round at the start of the lesson, before showing any diagram.
Full record and more free models: https://molgod.org/molecule/100-33-4/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/100-33-4/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Pentamidine-3D-molecular-model-engraved-CAS-100-33-4.stl
A ball-and-stick model of Pentamidine 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: 607,522 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.
Names in other languages: Pentamidin (de); pentamidyna (pl); 噴他脒 (zh).
Chemical identity
CAS Registry Number: 100-33-4
Molecular formula: C19H24N4O2
Molar mass: 340.4 g/mol (exact mass 340.18992602)
IUPAC name: 4-[5-(4-carbamimidoylphenoxy)pentoxy]benzenecarboximidamide
MolGod ID: MG_172-244-784-72 (https://molgod.org/id/MG_172-244-784-72)
PubChem CID: 4735 (https://pubchem.ncbi.nlm.nih.gov/compound/4735)
Wikidata: Q416206 (https://www.wikidata.org/wiki/Q416206)
EC number: 202-841-0
ChemSpider ID: 4573
InChIKey: XDRYMKDFEDOLFX-UHFFFAOYSA-N
SMILES: C1=CC(=CC=C1C(=N)N)OCCCCCOC2=CC=C(C=C2)C(=N)N
Required attribution (CC BY-SA 4.0): "Pentamidine 3D model by MolGod.org — https://molgod.org/molecule/100-33-4/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/