Cuneane (from Latin cuneus 'wedge'[1]) is a saturated hydrocarbon with the formula C8H8 and a 3D structure resembling a wedge, hence the name.

Cuneane may be produced from cubane by metal-ion-catalyzed σ-bond rearrangement.

[4][5] The carbon atoms in the cuneane molecule form a hexahedron with point group C2v.

The cuneane molecule has three kinds of equivalent carbon atoms (A, B, C), which have also been confirmed by NMR.

[6] The molecular graph of the carbon skeleton of cuneane is a regular graph with non-equivalent groups of vertices, and so it is a very important test object for different algorithms of mathematical chemistry.