H2C
Methylene · Carbene, Methylidene
Methylene is a highly reactive and unstable chemical intermediate consisting of a carbon atom bonded to two hydrogen atoms.
About Methylene
Methylene is a highly reactive, metastable species consisting of a single carbon atom bonded to two hydrogen atoms. Due to its electronic configuration, it acts as a transient intermediate rather than a stable bulk material, making it a subject of intense study in fundamental chemical kinetics and molecular physics. Its insulating electronic character reflects its nature as a discrete molecular entity rather than an extended solid-state lattice. Because it is inherently unstable, it is typically generated in situ during chemical reactions rather than isolated as a traditional crystalline material. Its significance lies in its ability to facilitate complex bond-forming processes, serving as a critical building block in organic synthesis and combustion chemistry.
Key Properties
Cross-validated computational properties for Methylene, aggregated across 4 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.
Synthesis Routes
Literature-extracted synthesis procedures targeting H2C.
Applications
Where Methylene is used.
Frequently Asked Questions
Common questions about Methylene, answered from cross-validated data.
What is H2C?
Methylene is a highly reactive and unstable chemical intermediate consisting of a carbon atom bonded to two hydrogen atoms.
What is H2C used for?
What is the band gap of H2C?
Is H2C a metal, semiconductor, or insulator?
Is H2C thermodynamically stable?
How many polymorphs of H2C are known?
How is H2C synthesized?
What elements does H2C contain?
Where does the data for H2C come from?
How It Compares
As a fundamental carbene, methylene serves as the prototypical member of its class, defining the reactivity patterns for more complex substituted derivatives. Unlike stable, bulk-phase hydrocarbons, its metastability dictates that it must be handled as a fleeting, high-energy intermediate in specialized laboratory environments.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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