Tetrahedrane vs. Dodecahedrane — What's the Difference?

Tetrahedrane is a hypothetical platonic hydrocarbon with chemical formula C4H4 and a tetrahedral structure. The molecule would be subject to considerable angle strain and has not been synthesized as of 2021.

Dodecahedrane is a chemical compound, a hydrocarbon with formula C20H20, whose carbon atoms are arranged as the vertices (corners) of a regular dodecahedron. Each carbon is bound to three neighbouring carbon atoms and to a hydrogen atom.

(organic compound) Hypothetically, one of the Platonic hydrocarbons, C₄H₄, having the carbon atoms at the vertices of a tetrahedron; has not yet been synthesized, and would be very unstable.

(organic compound) One of the Platonic hydrocarbons, C₂₀H₂₀, having the carbon atoms at the vertices of a regular dodecahedron.