What happens when you put another double bond between carbon atoms in propene? Since the definition includes one or more double bonds. Share with your friends Share 0 Geetha answered this Propene is a molecule having 1 double bond CH3-CH=CH2 : Formula = C3H6When propene have two double bond like below, the molecule is called alleneCH2=C=CH2 : Formula = C3H4 0 View Full Answer Ambuj Dwivedi answered this CH3 0