Nitrocarbons as oxidizer ?

Some nitrocarbons of higher numbers are more stable so i wonder if nitro derivative of the readily availible - Butane, is possible to synthesis.

Here are some structures that i drew i wonder if possible to make.

I also wonder if we can make a 2d cube derive of the butane ? i guess it would be more stable and dense ?

and the isobutane ? we would be able to hang an extra nitro group !