Hydrogenation of saturated organic and inorganic molecules in metallic hydrogen.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41022716.
- Also identified by DOI 10.1038/s41467-025-63552-6 and PMC identifier 12479789.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Metallic hydrogen is the most common condensed material in the universe, however, experimental studies are extremely challenging, and understanding of this material has been led by theory. Chemistry in this environment has not been probed experimentally, so here we examine carbon, nitrogen, and oxygen in metallic hydrogen using density functional theory calculations. We find that carbon, nitrogen and oxygen react with each other and metallic hydrogen to produce molecules with covalent-type bonding based on sixfold coordinated carbon, threefold oxygen and fourfold nitrogen: CH<sub>6</sub>, C<sub>2</sub>H<sub>8</sub>, C<sub>3</sub>H<sub>10</sub>, OH<sub>3</sub>, NH<sub>4</sub>, and CH<sub>4</sub>OH. In view of the excess hydrogen we refer to them as hypermethane, hyperethane etc. This work suggests that molecular chemistry may take place in very different environments from those found on earth, and may be common throughout the universe. Furthermore, the solubility of C, O, and N casts doubt on whether rocky cores can exist in giant planets.