1-(2-Hydroxyethyl)piperazine 3D Molecular Model — CAS 103-76-4

1-(2-Hydroxyethyl)piperazine (C6H14N2O, CAS 103-76-4) — a free educational 3D molecular model for teachers and students, by MolGod.org. Read the atoms directly: each sphere bears an engraved element symbol.

A one-colour print of a molecule hides the most basic information, which element each atom is, because STL keeps no colour data. MolGod adds what the STL format leaves out by engraving the element symbol into each atom of the printed structure. The aim of this scientific education project is to help students identify the atoms of a molecule faster and so grasp its chemistry and 3D geometry sooner. It shortens the path from lesson plan to printed model, because no one has to build the molecule or add labels by hand. Read why we engrave the atoms, and which studies inspired the project: https://molgod.org/engraved-molecular-models/.

Let the group sketch what they see in 1-(2-Hydroxyethyl)piperazine, namely one 6-membered ring; afterwards they compare the sketch with the 23 bonds on the model (all of them single). Counting task: 6 C + 14 H + 2 N + 1 O gives 23 engraved spheres; can the class rebuild the formula C6H14N2O from the model alone? Functional groups to find on the model: hydroxyl group (-OH), secondary amino group (-NH-) and tertiary amino group (-NR2). Plan it into a unit on alcohols and hydrogen bonding, as well as on amines and basicity. Worth printing alongside it: 1-(2-Methoxyethyl)piperazine (CAS 13484-40-7), structurally the nearest in the collection.

Part of the MolGod.org free library of engraved molecules for chemistry classrooms. 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. 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. No sign-up, no fees and no review required. 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/. Questions about the chemistry behind this molecule are welcome too: start a discussion in the comments and we will happily join in. Missing a compound for your lesson? Give us the CAS number and we are happy to create its 3D model.

Full record and more free models: https://molgod.org/molecule/103-76-4/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/103-76-4/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:1-(2-Hydroxyethyl)piperazine-3D-molecular-model-engraved-CAS-103-76-4.stl
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23629922

A ball-and-stick model of 1-(2-Hydroxyethyl)piperazine 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: 246,582 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: N-Hydroxyethylpiperazin (de).

Chemical identity

• CAS Registry Number: 103-76-4

• Molecular formula: C6H14N2O

• Molar mass: 130.19 g/mol (exact mass 130.110613074)

• IUPAC name: 2-piperazin-1-ylethanol

• MolGod ID: MG_129-740-398-37 (https://molgod.org/id/MG_129-740-398-37)

• PubChem CID: 7677 (https://pubchem.ncbi.nlm.nih.gov/compound/7677)

• Wikidata: Q27278910 (https://www.wikidata.org/wiki/Q27278910)

• EC number: 203-142-3

• ChemSpider ID: 7394

• InChIKey: WFCSWCVEJLETKA-UHFFFAOYSA-N

• SMILES: C1CN(CCN1)CCO

Required attribution (CC BY-SA 4.0): "1-(2-Hydroxyethyl)piperazine 3D model by MolGod.org — https://molgod.org/molecule/103-76-4/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/