What is the IUPAC name of the compound with the formula C3H6?

The correct IUPAC name for the compound with the formula C3H6 is Propene. This compound is an alkene, which means it contains at least one carbon-carbon double bond. In C3H6, the three carbon atoms can be connected in a straight chain with a double bond between the first and second carbon, leading to the structure CH2=CH-CH3.

When naming alkenes, the suffix "-ene" is used to indicate the presence of a double bond, and the root "prop" indicates that there are three carbon atoms involved. Since this specific compound does not have any functional groups that would change the nomenclature, the name Propene is straightforward and specifically describes the structure.

The other options refer to different structures or functional groups. For instance, Propan-1-ol indicates a single bond and the presence of an alcohol (–OH) group, which is not the case for C3H6. Ethene refers to C2H4 and indicates a two-carbon alkene, which does not apply here. Butene refers to C4H8, a four-carbon alkene, which also doesn't match the formula provided. Therefore, the name Propene accurately represents the molecular structure of