1,1'-Oxybis(4-nitrobenzene) 3D Molecular Model — CAS 101-63-3

1,1'-Oxybis(4-nitrobenzene) (C12H8N2O5, CAS 101-63-3) — a free educational 3D molecular model for teachers and students, by MolGod.org. Instead of colour coding, every sphere carries its engraved element symbol.

Plain ball-and-stick prints look the same for every element: the STL format has no way to say which ball is carbon and which is oxygen. The MolGod approach puts the information where students look for it, on the atom: every sphere is engraved with its symbol. Our intended outcome is simple: students who hold the model should know each atom immediately and use the lesson to understand the molecule's structure. Teachers get the structure and its atom labels in a single download, which removes the slowest steps before a classroom print. Read why we engrave the atoms, and which studies inspired the project: https://molgod.org/engraved-molecular-models/.

Ask students to describe the framework of 1,1'-Oxybis(4-nitrobenzene) before anything else: two 6-membered rings, both aromatic. Then count the bonds together; there are 28 (14 single, 2 double and 12 aromatic, drawn in Kekulé form). Counting task: 12 C + 8 H + 2 N + 5 O gives 27 engraved spheres; can the class rebuild the formula C12H8N2O5 from the model alone? Where on the model can students see the two nitro groups (-NO2) and the ether linkage (C-O-C)? Let them search before you reveal the answer. Teachers covering aromaticity and delocalised electrons will find it a concrete example. Students who finish early can look up Bis(p-nitrophenyl) phosphate (CAS 645-15-8) and 4-Nitroaniline (CAS 100-01-6), the closest neighbours in the collection, and list what differs.

MolGod.org shares these models for free to make chemistry tangible in the classroom. Teachers: pair it with the MolGod.org record to connect the 3D shape with identifiers and data.

The model is yours to download, print and teach with. 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. There is no registration, no payment and no obligation to rate it. 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: https://molgod.org/contact/. Let's talk chemistry! Ask anything about this structure in the comments, and other teachers are warmly invited to share their lesson ideas. Need another molecule? Contact us and we will prepare a 3D model specially for you, starting from its CAS number.

Full record and more free models: https://molgod.org/molecule/101-63-3/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/101-63-3/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:1,1'-Oxybis(4-nitrobenzene)-3D-molecular-model-engraved-CAS-101-63-3.stl
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23553262

A ball-and-stick model of 1,1'-Oxybis(4-nitrobenzene) 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: 390,444 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: 4,4′-Dinitrodiphenylether (de).

Chemical identity

• CAS Registry Number: 101-63-3

• Molecular formula: C12H8N2O5

• Molar mass: 260.20 g/mol (exact mass 260.04332136)

• IUPAC name: 1-nitro-4-(4-nitrophenoxy)benzene

• MolGod ID: MG_273-288-811-72 (https://molgod.org/id/MG_273-288-811-72)

• PubChem CID: 7568 (https://pubchem.ncbi.nlm.nih.gov/compound/7568)

• Wikidata: Q27289802 (https://www.wikidata.org/wiki/Q27289802)

• EC number: 202-961-3

• ChemSpider ID: 7287

• InChIKey: MWAGUKZCDDRDCS-UHFFFAOYSA-N

• SMILES: C1=CC(=CC=C1[N+](=O)[O-])OC2=CC=C(C=C2)[N+](=O)[O-]

Required attribution (CC BY-SA 4.0): "1,1'-Oxybis(4-nitrobenzene) 3D model by MolGod.org — https://molgod.org/molecule/101-63-3/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/