H4C2O
H4C2O is a wide-gap insulating compound consisting of carbon, hydrogen, and oxygen that exhibits a variety of metastable structural forms.

About H4C2O
H4C2O is an insulating compound composed of carbon, hydrogen, and oxygen. It exhibits a wide electronic band gap, characteristic of materials that do not readily conduct electricity under standard conditions.
Despite its simple elemental composition, this compound shows significant structural complexity with numerous reported configurations. Its position above the thermodynamic hull suggests it is a metastable species that requires specific conditions for synthesis or stabilization.
Key Properties
Cross-validated computational properties for H4C2O, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Frequently Asked Questions
Common questions about H4C2O, answered from cross-validated data.
What is H4C2O?
H4C2O is a wide-gap insulating compound consisting of carbon, hydrogen, and oxygen that exhibits a variety of metastable structural forms.
What is the band gap of H4C2O?
Is H4C2O a metal, semiconductor, or insulator?
Is H4C2O thermodynamically stable?
How many polymorphs of H4C2O are known?
What elements does H4C2O contain?
Where does the data for H4C2O come from?
How It Compares
As a unique entry in this database, H4C2O represents a specific stoichiometric arrangement of light elements that serves as a case study for metastable organic-based structures. Unlike more common, highly stable oxides, this material highlights the challenges and possibilities of synthesizing complex carbon-hydrogen-oxygen phases that exist outside the ground-state equilibrium.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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