# What is the Molecular Formula for CH3-C≡C-CH2-CH3 [closed]

I am taking an Organic Chemistry class in my college and I was wondering what the Molecular Formula for CH3-C≡C-CH2-CH3 was.

It would also be nice to have the class of compound.

• Seems like 2-Pentene en.wikipedia.org/wiki/Pentene – sigrlami Jun 25 '13 at 16:46
• @RyanArmstrong, 2-pentene is not the correct name for this compound. The triple-bond makes it an alkyne, not an alkene. Jerry has correctly identified the compound in his answer below as 2-pentyne/pent-2-yne. – Greg E. Jun 25 '13 at 17:40

Are you sure you didn't mean the name of this molecule? Because strictly speaking, the molecular formula of the molecule you posted would be $\ce{C5H8}$. Pent-2-ene has molecular formula $\ce{C5H10}$.