What would be the name of this compound? Although I assume this compound is likely unable to be formed, my chemistry teacher put it up on the whiteboard to show the extent of what you can name using IUPAC nomenclature, out of interest I tried to name it and got hexcyclo[2.2.0.0.0]cyclohexane, is this correct or am I mistaken?
I think it is Cubane ($\ce{C8H8}$), a synthetic hydrocarbon molecule (Wikipedia), which has synthesized using following scheme:



I am confident about that because your teacher had said that there wasn't a central carbon atom (assumingly). See following illstration: