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Q: Chemical Abbreviation ( Answered,   1 Comment )
Question  
Subject: Chemical Abbreviation
Category: Science > Chemistry
Asked by: kross1170-ga
List Price: $2.00
Posted: 05 Aug 2002 06:58 PDT
Expires: 04 Sep 2002 06:58 PDT
Question ID: 50789
What is H2OC2?
Answer  
Subject: Re: Chemical Abbreviation
Answered By: tehuti-ga on 05 Aug 2002 09:32 PDT
 
Pinkfreud is correct.  The chemical is ketene.  Other names (synonyms)
for this chemical are: ethenone, carbomethene, and keto-ethylene.
The formula is more frequently written as C2H2O or CH2CO
Information from a search on ketene in ChemIDPlus
http://chem.sis.nlm.nih.gov/chemidplus/

However, if you want to indicate its stucture better, you can write it
as: H2C=C=O

Each = is a double bond.  The two carbon atoms are linked by a double
bond.  One of the carbons is also linked by a second double bond to
the oxygen atom, while the other carbon has two single bonds with two
hydrogen atoms.
If you go to http://chemistry.anl.gov/compmat/molecules/htm/ch2co.htm
you can see a picture of the molecule.  The hydogens are shown in
white, the carbons in grey and the oxygen in red.  If you click your
mouse onto the picture, and then move it around, the picture will
rotate and show you the shape of the molecule from different angles.

"Acetic acid is converted into hot vapor where it breaks down into
ketene and water in the presence of catalysts. The ketene so produced
again is reacted with acetic acid to give acetic anhydride."
Acetic anhydride is used to make aspirin, vitamin preparations,
adhesives, textiles, paints, and cellulose acetate.
http://www.indiainfoline.com/sect/chor/ch07.html

Please let me know in a clarification if you need any more information
about this.

Search strategy: I knew previously about ChemIDPlus.  I also searched
on Google for ketene, and for ketene + used + produce
Comments  
Subject: Re: Chemical Abbreviation
From: pinkfreud-ga on 05 Aug 2002 08:04 PDT
 
My best guess is ketene, whose formula is given as CH2CO or as C2H2O:

Wikipedia: CH2CO
http://www.wikipedia.com/wiki/ketene

InfoPlease: C2H2O
http://www.infoplease.com/ipd/A0504682.html

I believe H2OC2 may be an alternate formula for ketene, but I can find
no citation to back up my theory, so I am not posting this as an
answer. Perhaps a researcher with a deeper knowledge of organic
chemistry can help here.

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