Tetramethylethylene


Tetramethylethylene is a hydrocarbon with the formula Me2C=CMe2. A colorless liquid, it is the simplest tetrasubstituted alkene.

Synthesis and reactions

It is prepared by base-catalyzed isomerization of 2,3-dimethyl-1-butene.
Tetramethylethylene forms metal-alkene complexes with low-valent metals and reacts with diborane to give the monoalkyborane known as thexylborane.