Methylcyclobutane is an organic compound with the chemical formula . This is a cycloalkane consisting of a four-membered cyclobutane core substituted with a methyl group. It is a colorless, volatile liquid at room temperature and is primarily of interest in fundamental organic chemistry research, particularly in studies of ring strain and reaction mechanisms.
Synthesis Wurtz-type coupling: Reaction of 1,3-dibromopropane with methylene iodide and sodium metal yields methylcyclobutane, though this method suffers from low yields due to competing elimination and polymerization. Cycloaddition reactions: Photochemical cycloaddition of propene with ethylene or diazomethane-derived cyclopropanation followed by ring expansion can produce substituted cyclobutanes, including methylcyclobutane.
Physical properties Methylcyclobutane is a volatile, flammable liquid with a characteristic hydrocarbon odor. The compound is nonpolar and insoluble in water, but miscible with common organic solvents such as diethyl ether, ethanol, and benzene. Decomposes upon heating.
The compound is toxic.
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