Methylidenecarbene information

Methylidenecarbene
Names
	Systematic IUPAC name λ2-ethene (substitutive); dihydrido-1κ2H-dicarbon(C—C) (additive)
Identifiers
CAS Number	2143-69-3;
3D model (JSmol)	Interactive image;
PubChem CID	6432236;
CompTox Dashboard (EPA)	DTXSID901046563 ;
	InChI InChI=1S/C2H2/c1-2/h1H2 Key: SNVLJLYUUXKWOJ-UHFFFAOYSA-N;
	SMILES [C]=C;
Properties
Chemical formula	C2H2
Molar mass	26.038 g·mol−1
Appearance	Colourless gas
Solubility in water	Hydrolyses
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Methylidenecarbene (systematically named λ²-ethene and dihydrido-1κ²H-dicarbon(C—C)) is an organic compound with the chemical formula C=CH
₂ (also written [CCH
₂] or C
₂H
₂). It is a metastable proton tautomer of acetylene, which only persists as an adduct. It is a colourless gas that phosphoresces in the far-infrared range. It is the simplest unsaturated carbene.

Methylidenecarbene information

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Methylidenecarbene

C2H2

Vinylidene group

Names

Systematic IUPAC name λ²-ethene (substitutive) dihydrido-1κ²H-dicarbon(C—C) (additive)
Identifiers
CAS Number	2143-69-3
3D model (JSmol)	Interactive image
PubChem CID	6432236
CompTox Dashboard (EPA)	DTXSID901046563
InChI InChI=1S/C2H2/c1-2/h1H2 Key: SNVLJLYUUXKWOJ-UHFFFAOYSA-N
SMILES [C]=C
Properties
Chemical formula	C₂H₂
Molar mass	26.038 g·mol⁻¹
Appearance	Colourless gas
Solubility in water	Hydrolyses
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references