Ethanimine

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title: "Ethanimine" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["imines", "amines"] topic_path: "general/imines" source: "https://en.wikipedia.org/wiki/Ethanimine" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Name = Ethanimine / ethenamine | ImageFileL1 = Ethanimine 3D Ball and Stick.png | ImageFileL2 = Ethanimine skeletal.svg | ImageFileR1 = Vinylamine-3D-balls.png | ImageFileR2 = Ethenamine 200.svg | ImageFile3 = Vinylamin Tautomerie.svg | PIN = Ethanimine | OtherNames = As imine: ethylimine, ethylideneimine, ethylidenimine, acetaldehyde imine, acetaldehyde-ammonia Schiff base, acetaldimine, iminoethane

As amine: ethenamine, ethyleneamine, ethylideneamine, aminoethylene, vinylamine, vinyl amine |Section1={{Chembox Identifiers | CASNo = 20729-41-3 | PubChem = 140746 | ChemSpiderID = 11539075 | SMILES = CC=N | InChI = 1/C2H5N/c1-2-3/h2-3H,1H3 | InChIKey = MPAYEWNVIPXRDP-UHFFFAOYAR | StdInChI = 1S/C2H5N/c1-2-3/h2-3H,1H3 | StdInChIKey = MPAYEWNVIPXRDP-UHFFFAOYSA-N |Section2={{Chembox Properties | C=2 | H=5 | N=1 | Appearance = | Density = | MeltingPt = | BoilingPt = | Solubility = |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = |Section8={{Chembox Related | OtherCompounds = N-Methylmethanimine Methanimine

Ethanimine is an organonitrogen compound classified as an imine. It is formed by reacting acetaldehyde and ammonia, but rapidly polymerizes to acetaldehyde ammonia trimer.

It has two tautomers: ethanimine, an imine, and ethenamine or aminoethylene, an amine. Ethanimine has two hydrogens on the carbon, while ethenamine has two on the nitrogen atom.

Occurrence

It is not well known terrestrially, but has been detected in abundance toward Sagittarius B2 (Sgr B2), a dense interstellar cloud between stars toward the Galactic Center of the Milky Way. The distance between the Sgr B2 cloud and center of galaxy is 100 pc (1 pc = 3.26 ly). Ethanimine is mainly found in hot cores of ISM clouds; in case of Sgr B2, the region would be the Sgr B2 N and Sgr B2 M. Radio telescopes such as the Green Bank Observatory's Green Bank Telescope and those operated by the National Radio Astronomy Observatory (measuring radio frequency light lambda ranging from 1–300 GHz) are able to detect organic molecules such as ethanimines because its internal energy transition, more specifically the rotational transition is within the radio frequency of 14085 MHz = 140.8 GHz. The data shown in figure 1. *Ethanimine data from GBT telescope corresponds to the resulting spectral data gathered in a Lab experiment performed with a precursor H2CN, CN, NH, NO, NH2, NH3, NH4+, N2H+, CH+, HCN+ and HCNH when radiating it with 1600 eV electron force. Ultimately goal to form an ethanimine, get its spectra results to be compared with radio results.

References

References

  1. (1995). "Complex molecules in Sagittarius B2(N): The importance of grain chemistry". The Astrophysical Journal.
  2. (2011). "Experimental investigation of nitrile formation from VUV photochemistry of interstellar ices analogs: Acetonitrile and amino acetonitrile". Astronomy & Astrophysics.
  3. Dept. Of Astrochemistry and Astrophysical science at Ohio St. Univ. [Online, 2012]. molspect.chemistry.ohio-state.edu/symposium/Program/RF.html.bak

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iminesamines