Butylene

In chemistry, butylene may be an alternate name for the hydrocarbon butene, C₄H₈. It is also a divalent functional group with formula C₄H₈^2• that can be seen as the result of removing two hydrogen atoms from a butane molecule, leaving two free bonds.

There are several isomers of butylene, depending on the starting isomer of butane and the positions of the free bonds:

• From straight-chain butane (n-butane):
  • 1,1-Butylene
  • 1,2-Butylene
  • 2,2-butylene
  • 1,3-Butylene
  • 2,3-Butylene (which has two stereoisomers, cis and trans)
  • 1,4-Butylene
• From branched butane (isobutane, methylpropane):
  • 1,1-Isobutylene
  • 1,2-Isobutylene
  • 1,3-Isobutylene