Cyclobutane
Cyclobutane or cyclobutane is a cycloalkane having the formula C4H8 and having four carbon atoms in the molecule. Due to the repulsion of the hydrogen atom, each group of bonds is slightly larger, but the carbon atoms are not on the plane. The addition reaction is good as cyclopropane, but the coupling angle is 90 degrees, which makes it difficult to perform addition reaction better than cyclopropane. Bromine water does not decolorize.