Tetra-tert-butylethylene

Tetra-tert-butylethylene is a hypothetical organic compound, a hydrocarbon with formula C₁₈H₃₆, or ((H₃C−)₃C−)₂C=C(−C(−CH₃)₃)₂. As the name indicates, its molecular structure can be viewed as an ethylene molecule H₂C=CH₂ with the four hydrogens replaced by tert-butyl −C(−CH₃)₃ groups.

Tetra-tert-butylethylene

Skeletal formula of tetra-tert-butylethylene
Names
Preferred IUPAC name 3,4-Di-tert-butyl-2,2,5,5-tetramethylhex-3-ene[1]
Identifiers
CAS Number	75245-23-7 Y
3D model (JSmol)	Interactive image
ChemSpider	19627020 Y
PubChem CID	13179773
CompTox Dashboard (EPA)	DTXSID70525078
InChI InChI=1S/C18H36/c1-15(2,3)13(16(4,5)6)14(17(7,8)9)18(10,11)12/h1-12H3 Y Key: WXTSAYDLWHISDR-UHFFFAOYSA-N Y
SMILES CC(C)(C)C(=C(C(C)(C)C)C(C)(C)C)C(C)(C)C
Properties
Chemical formula	C18H36
Molar mass	252.486 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

As of 2006, this compound had not yet been synthesized, in spite of many efforts. It is of interest in chemical research as an alkene whose double bond is strained but protected by steric hindrance. Theoretical studies indicate that the molecule should be stable, with a strain energy of about 93 kcal/mol (390 kJ/mol).^[2]

See also

• Tetra-tert-butylmethane, C₁₇H₃₆, another "impossible" hydrocarbon
• C₁₈H₃₆