C3H8N4He

C3H8N4He is a chemical formula representing a species that would contain three carbon atoms, eight hydrogen atoms, four nitrogen atoms, and a single helium atom. There is no widely reported, stable molecule with this exact composition in standard chemical databases, so the formulation is generally discussed in hypothetical or exploratory contexts.

If such a species existed, the helium atom would most likely not be covalently bonded to the organic framework. Instead, He could be present as a van der Waals adduct to a neutral organic molecule with the C3H8N4 core or as an inclusion in a larger host structure, such as a cryogenic matrix or a molecular cluster. The precise arrangement of the C3H8N4 portion would depend on the specific isomer and could vary widely, as many constitutional and stereochemical possibilities exist for a three-carbon, four-nitrogen skeleton.

In practice, helium-containing organic complexes are typically observed only under special conditions, such as low temperatures or in inert-gas matrices, and often have limited lifetimes. Any binding of helium to a C3H8N4 framework would be weak, with small binding energies dominated by dispersion forces rather than chemical bonds.

Evidence for such a compound would come primarily from theoretical calculations or spectroscopic signatures in specialized experiments, rather than conventional bulk synthesis. As a result, C3H8N4He remains a hypothetical construct used in discussions of gas-phase complexes and computational chemistry.

See also: helium chemistry; van der Waals complexes; endohedral inclusion; cryogenic matrix spectroscopy.