* Double Bond: 3-octene has a double bond between the third and fourth carbon atoms.

* Two Different Groups on Each Carbon: Each carbon involved in the double bond has two different groups attached to it. For example:

* Carbon 3: It has a hydrogen atom and a propyl group (CH3CH2CH2-) attached.

* Carbon 4: It has a hydrogen atom and a butyl group (CH3CH2CH2CH2-) attached.

Cis and Trans Isomers:

* Cis Isomer: The two hydrogen atoms are on the same side of the double bond.

* Trans Isomer: The two hydrogen atoms are on opposite sides of the double bond.

Let me know if you'd like to see a visual representation of these isomers!