![Tetramethylethylene Tetramethylethylene](/modules/owlapps_apps/img/nopic.jpg)
Tetramethylethylene is a hydrocarbon with the formula Me2C=CMe2 (Me = methyl). A colorless liquid, it is the simplest tetrasubstituted alkene.
It can be prepared by base-catalyzed isomerization of 2,3-dimethyl-1-butene. Another route involves direct dimerization of propylene. It can also be produced by photolysis of tetramethylcyclobutane-1,3-dione.
Tetramethylethylene forms metal-alkene complexes with low-valent metals and reacts with diborane to give the monoalkyborane known as thexylborane.
Oxidation gives pinacol.
It is a precursor to the herbicide fenpropathrin.
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