4,4'-Dithiodimorpholine (DTDM) 3D Molecular Model — CAS 103-34-4

4,4'-Dithiodimorpholine (DTDM) (C8H16N2O2S2, CAS 103-34-4) — a free educational 3D molecular model for teachers and students, by MolGod.org. No legend required: the element symbol is engraved on each atom.

A one-colour print of a molecule hides the most basic information, which element each atom is, because STL keeps no colour data. Each atom of a MolGod model is engraved with its element symbol, turning a plain print into a self-explaining teaching object. Every file is meant for the classroom: designed to help learners identify atoms quickly and then explore how they are joined in the molecule. Teachers get the structure and its atom labels in a single download, which removes the slowest steps before a classroom print. Background, references and the planned classroom study: https://molgod.org/engraved-molecular-models/.

Let the group sketch what they see in 4,4'-Dithiodimorpholine (DTDM), namely two 6-membered rings; afterwards they compare the sketch with the 31 bonds on the model (all of them single). Quick starter: ask students to count the engraved symbols (8 C + 16 H + 2 N + 2 O + 2 S) and check that they add up to 30 atoms and the formula C8H16N2O2S2. Name-and-locate exercise: students find the two ether linkages (C-O-C) on the model and afterwards write the name of every group they found. Its closest structural relatives in the MolGod.org collection are Dimorpholinomethane (CAS 5625-90-1) and 1,4-dioxane (CAS 123-91-1); printing them side by side makes a quick compare-and-contrast exercise. On paper the molecule offers 0 donors and 6 acceptors for hydrogen bonding (computed); ask students which atoms they expect to take part.

Part of the MolGod.org free library of engraved molecules for chemistry classrooms. Teachers: pass the model round at the start of the lesson, before showing any diagram.

This printable molecule is free to use in lessons, clubs and workshops. Publishing pictures, materials or remixes of it? Under CC BY-SA 4.0, name "MolGod.org" as the author, link back to the original and to the licence, mark your changes and keep remixes under the same terms. A ready-made attribution is included below. There is no registration, no payment and no obligation to rate it. Feedback is the most important part of this project: your review in the comments shows us how to improve the whole collection and build better models. 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? 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/103-34-4/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/103-34-4/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Dtdm-3D-molecular-model-engraved-CAS-103-34-4.stl
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23629812

A ball-and-stick model of 4,4'-Dithiodimorpholine (DTDM) 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: 361,186 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Chemical identity

• CAS Registry Number: 103-34-4

• Molecular formula: C8H16N2O2S2

• Molar mass: 236.4 g/mol (exact mass 236.06532010)

• IUPAC name: 4-(morpholin-4-yldisulfanyl)morpholine

• MolGod ID: MG_720-700-498-86 (https://molgod.org/id/MG_720-700-498-86)

• PubChem CID: 7648 (https://pubchem.ncbi.nlm.nih.gov/compound/7648)

• Wikidata: Q27283591 (https://www.wikidata.org/wiki/Q27283591)

• EC number: 203-103-0

• ChemSpider ID: 7365

• InChIKey: HLBZWYXLQJQBKU-UHFFFAOYSA-N

• SMILES: C1COCCN1SSN2CCOCC2

Required attribution (CC BY-SA 4.0): "4,4'-Dithiodimorpholine (DTDM) 3D model by MolGod.org — https://molgod.org/molecule/103-34-4/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/