3-Bromo-5-chloro-2-methoxypyridine 3D Molecular Model — CAS 102830-75-1

3-Bromo-5-chloro-2-methoxypyridine (C6H5BrClNO, CAS 102830-75-1) — a free educational 3D molecular model for teachers and students, by MolGod.org. Whatever the filament colour, each atom reads clearly thanks to its engraved symbol.

Most printable molecule files rely on colour coding, yet the STL format carries no colour and a single-filament print loses it entirely. MolGod adds what the STL format leaves out by engraving the element symbol into each atom of the printed structure. The purpose is educational: teachers get printable files built to shorten the step of 'which atom is this?' and leave more time for chemistry. Teachers get the structure and its atom labels in a single download, which removes the slowest steps before a classroom print. More about the hypothesis we are testing with these models: https://molgod.org/engraved-molecular-models/.

Look at the skeleton first: 3-Bromo-5-chloro-2-methoxypyridine contains one aromatic 6-membered ring, and students can trace 15 bonds (9 single and 6 aromatic, drawn in Kekulé form). Give each pair of students the model and a blank sheet: recording every engraved symbol should lead them to 6 C + 5 H + 1 Br + 1 Cl + 1 N + 1 O, which is 15 atoms. On the printed model, students can point to the ether linkage (C-O-C), the pyridine-type ring nitrogen, the C-Cl bond and the C-Br bond. Use it when you teach aromaticity and delocalised electrons, heteroaromatic rings (nitrogen inside an aromatic ring), as well as organohalogen compounds and carbon-halogen bonds. For compare-and-contrast work, 5-Bromo-2-chloro-4-methylpyridine (CAS 778611-64-6) and 3-Bromo-5-chloropyridine (CAS 73583-39-8) are structurally close to it in this collection.

MolGod.org offers this engraved model free to anyone teaching or learning chemistry. 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. CC BY-SA 4.0 sets four simple conditions for anything you publish with it: credit "MolGod.org" as the model's author, link the original and the licence, say what you changed, and share derivatives alike. Copy the attribution line below to get it right. 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: https://molgod.org/contact/. The comment section is open for discussion: how did you introduce this molecule, and what did your students notice first? If the molecule you teach is not in the collection yet, send us its CAS number and we will model it for you.

Full record and more free models: https://molgod.org/molecule/102830-75-1/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/102830-75-1/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:3-Bromo-5-chloro-2-methoxypyridine-3D-molecular-model-engraved-CAS-102830-75-1.stl
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23586744

A ball-and-stick model of 3-Bromo-5-chloro-2-methoxypyridine 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: 216,434 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Chemical identity

• CAS Registry Number: 102830-75-1

• Molecular formula: C6H5BrClNO

• Molar mass: 222.47 g/mol (exact mass 220.92430)

• IUPAC name: 3-bromo-5-chloro-2-methoxypyridine

• MolGod ID: MG_539-355-521-41 (https://molgod.org/id/MG_539-355-521-41)

• PubChem CID: 13567751 (https://pubchem.ncbi.nlm.nih.gov/compound/13567751)

• Wikidata: Q72452948 (https://www.wikidata.org/wiki/Q72452948)

• EC number: 639-404-2

• InChIKey: AYEVELLBDURPJW-UHFFFAOYSA-N

• SMILES: COC1=C(C=C(C=N1)Cl)Br

Required attribution (CC BY-SA 4.0): "3-Bromo-5-chloro-2-methoxypyridine 3D model by MolGod.org — https://molgod.org/molecule/102830-75-1/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/