Description

This entry presents 4,4'-Diaminodiphenyl Ether (C12H12N2O; CAS 101-80-4; PubChem CID 7579 (https://pubchem.ncbi.nlm.nih.gov/compound/7579)) as a 3D-printable ball-and-stick model in which every atom carries its engraved element symbol (C, H, N, O), so the model can be read without a colour key. Atomic coordinates come from the PubChem-computed 3D conformer (not an experimental crystal structure); coordinates and connectivity are unchanged. Structure at a glance 27 atoms: 12 C, 12 H, 2 N, 1 O 28 bonds: 16 single, 12 aromatic Two 6-membered rings, both aromatic Functional groups: one ether linkage (C-O-C) and two primary amino groups (-NH2) Two hydrogen-bond donors and three acceptors (computed) No carbon atom is sp3-hybridised Use in teaching Counting task: students tally the engraved symbols (12 C, 12 H, 2 N, 1 O; 27 atoms) and rebuild the formula C12H12N2O from the model alone. Aromaticity: identify the two aromatic rings and the 12 bonds recorded as aromatic. Functional groups: find the ether linkage (C-O-C) and the two primary amino groups (-NH2) on the model and name each one. File and printing STL mesh of 359,500 triangles, a closed (watertight) single solid. Coordinates are in ångström and STL stores no unit, so scale the model deliberately in your slicer. Measured bounding box: 9.151 × 8.592 × 5.419 Å; at scale factor 10 (1 Å to 10 mm, file read in millimetres) the print measures about 91.5 × 85.9 × 54.2 mm. SHA-256: 522eeb3f91bf0db6d8c12c80736fd5991983ab4fb504fef368045324b721526e. Validation InChIKey identical to the PubChem record (PubChem FTP SDF, file dated 2026-10-08): HLBLWEWZXPIGSM-UHFFFAOYSA-N Molecular formula and hydrogen-bond donor/acceptor counts identical to PubChem Mesh: triangle count in the header equals the actual count; 0 edges not shared by exactly two triangles; 1 connected solid; SHA-256 equal to the published file Source, licence and identifiers Full record: molgod.org/molecule/101-80-4 (https://molgod.org/molecule/101-80-4/?utm_source=nih3d&utm_medium=referral&utm_campaign=edu-3d-models) · Licence and provenance record: molgod.org/licenses/stl/101-80-4 (https://molgod.org/licenses/stl/101-80-4/) · Same file on Wikimedia Commons: File:4,4'-Diaminodiphenyl Ether-3D-molecular-model-engraved-CAS-101-80-4.stl (https://commons.wikimedia.org/wiki/File:4,4) MolGod ID: MG_469-591-254-16 (https://molgod.org/id/MG_469-591-254-16) Wikidata: Q3704503 (https://www.wikidata.org/wiki/Q3704503) EC number: 202-977-0 ChemSpider ID: 7298 IUPAC name: 4-(4-aminophenoxy)aniline InChIKey: HLBLWEWZXPIGSM-UHFFFAOYSA-N SMILES: C1=CC(=CC=C1N)OC2=CC=C(C=C2)N Molar mass 200.24 g/mol (exact mass 200.094963011) Licence: CC BY-SA 4.0 (licence text (https://creativecommons.org/licenses/by-sa/4.0/)). Required attribution: "4,4'-Diaminodiphenyl Ether 3D model by MolGod.org — https://molgod.org/molecule/101-80-4/ — CC BY-SA 4.0".