Trimethylenemethane

Trimethylenemethane
	; Trimethylenemethane, average of three configurations. Formally, the radial bonds have valency ⁠4/3⁠. Each terminal carbon has ⁠2/3⁠ of an unfilled valence bond.
Names
	Preferred IUPAC name 2-Methylidenepropane-1,3-diyl
	Other names Trimethylenemethane biradical; Trimethylenemethane diradical
Identifiers
CAS Number	13001-05-3;
3D model (JSmol)	Interactive image; Interactive image;
PubChem CID	11790068;
	InChI InChI=1S/C4H6/c1-4(2)3/h1-3H2 Key: MOWBWPSGCTXGKR-UHFFFAOYSA-N;
	SMILES [CH2-]C(=C)[CH2+]; [CH2][C]([CH2])[CH2];
Properties
Chemical formula	C4H6
Molar mass	54.092 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Trimethylenemethane (often abbreviated TMM) is a chemical compound with formula C
₄H
₆. It is a neutral free molecule with two unsatisfied valence bonds, and is therefore a highly reactive free radical. Formally, it can be viewed as an isobutylene molecule C
₄H
₈ with two hydrogen atoms removed from the terminal methyl groups.

Names
Trimethylenemethane, average of three configurations. Formally, the radial bonds have valency ⁠4/3⁠. Each terminal carbon has ⁠2/3⁠ of an unfilled valence bond.
Preferred IUPAC name 2-Methylidenepropane-1,3-diyl
Other names Trimethylenemethane biradical; Trimethylenemethane diradical
Identifiers
CAS Number	13001-05-3
3D model (JSmol)	Interactive image Interactive image
PubChem CID	11790068
InChI InChI=1S/C4H6/c1-4(2)3/h1-3H2 Key: MOWBWPSGCTXGKR-UHFFFAOYSA-N
SMILES [CH2-]C(=C)[CH2+] [CH2][C]([CH2])[CH2]
Properties
Chemical formula	C₄H₆
Molar mass	54.092 g·mol⁻¹
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references