Basic Info
  • Grade: Pharmaceutical Grade

    Factory Location: Wuhan

    Main Sales Markets: North America,Central/South America,Western Europe,Eastern Europe,Australasia,Asia,Middle East,Africa

  • Sample Provided: no

    Product name

    Methyldienedione

    Synonyms

    Estra-4,9-Diene-3,17-Dione

    MOQ

    25KG

    CAS No.

    5173-46-6

    Appearance

      An almost white powder

    Molecular Formula

    C18H22O2

    Molecular Weight

    270.3661

    Assay

    99%

    Application

    Pharma grade or research purpose

    Packing

    As per your request

    Storage

    Preserve in tight, light-resistant containers in a cool place

    Remarks

    NA

    Custom synthesis

    Available

    Supply Ability

    10000kg/month

     

    Medical use

     

    Ethylene dione or ethylenedione, also called dicarbon dioxide, ethenedione, or ethene-1,2-dione, is a chemical compound with the formula C2O2 or OCCO. It is the carbon-carbon covalent dimer of carbon monoxide and belongs to the oxocarbon series. Because it is a dimer, it shares an empirical formula with CO. It can be thought of as ketene of glyoxylic acid (OHCCOOH).

     

    The existence of OCCO was first suggested in 1913. However, despite its deceptively "simple" structure, for over a century the compound had eluded all attempts to synthesize and observe it. Such elusive nature had earned OCCO the reputation of a hypothetical compound and a mysterious, "exceedingly coy molecule".

     

    It was not until 2015 that a group of chemists from the University of Arizona in Tucson (United States) reported the first spectroscopic characterization of OCCO, confirming its existence as a transient molecule. The Arizona group created OCCO using laser light to eject electrons from the corresponding stable singly-charged anions. Recently, spectra of oxyallyl diradical, C3H4O, were also found to have features nearly identical to those reported for OCCO and the spectra for ethylenedione reported by the Arizona group is reassigned to the oxyallyldiradical.  In conclusion, the long-lived states of ethylenedione, sought experimentally for over a century, remain unobserved. Recently, the in situ preparation and characterization of the OCCO through low-energy free-electron induced single molecular engineering has also been theoretically proposed by scientists from Bhabha Atomic Research Centre (India).

     

    Despite the existence of the closed-shell Kekulé structure, O=C=C=O, the lowest bound state of ethyledione is a triplet. Therefore, bound OCCO is formally a diradical, with an electronic structure motif similar to the oxygen molecule. However, when the molecule is distorted away from its equilibrium geometry, the potential surfaces of the triplet and singlet states intersect, allowing for intersystem crossing to the singlet state, which is unbound and dissociates to two ground-state CO molecules. The timescale of the intersystem crossing was predicted to be 0.5 ns, making triplet OCCO a transient, yet spectroscopically long-lived molecule.

     

    On the other hand, the monoanion of ethylenedione, OCCO−, as well as the divalent anion, called acetylenediolate, are both stable.

Send your message to this supplier
  • From:
  • To:
    Hanways Chempharm Co.,Limited
  • Send a Copy to this Email
  • Message:
    Upload Images / Files
    - Supports jpg, jpeg, png,
     gif, pdf, doc, docx,
     xls, xlsx, txt, rar and zip
    - Max upload 3 files;
     Max  total size: 3MB
    (0/3)

    Enter between 20 to 4,000 characters.This is not what you are looking for ? Post a Sourcing Request Now

  • Verification:
PharmaSources Customer Service