Dihydroxymethylidene

Dihydroxymethylidene or carbonous acid is a chemical compound with formula C(OH)2. It is an unstable tautomer of formic acid. There is no evidence that this compound exists in solution, but the molecule has been detected in the gas phase. Many related carbenes are known, although they are often transient.

Dihydroxymethylidene
Names
IUPAC names
Carbon(II) hydroxide
Carbon dihydroxide
Carbonous hydroxide
Preferred IUPAC name
Dihydroxymethylidene
Other names
Carbonic(II) acid
Carbonous acid
Dihydroxycarbene
Dihydroxymethylene
Dihydroxycarbon(2•)
Identifiers
3D model (JSmol)
ChemSpider
MeSH Dihydroxycarbene
  • InChI=1S/CH2O2/c2-1-3/h2-3H Y
    Key: VZOMUUKAVRPMBY-UHFFFAOYSA-N Y
  • O[C]O
Properties
C(OH)
2
2•
Related compounds
Related compounds
Formic acid

Lead(II) hydroxide
Orthocarbonic acid
Tin(II) hydroxide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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