PI3
Phosphorus triiodide · Phosphorus(III) iodide
Phosphorus triiodide is a stable semiconducting compound frequently employed as a chemical reagent in organic synthesis.

About Phosphorus triiodide
Phosphorus triiodide is a thermodynamically stable compound that serves as a vital phosphorus-based reagent. Its semiconducting electronic character and structural versatility make it a significant subject of study, with numerous reported structural configurations documented in material databases.
This compound is primarily utilized for its ability to facilitate specific chemical transformations, particularly in halogenation reactions. Its stability and reactivity profile allow it to function effectively in laboratory and industrial settings where precise molecular modifications are required.
Key Properties
Cross-validated computational properties for Phosphorus triiodide, 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.
Applications
Where Phosphorus triiodide is used.
Frequently Asked Questions
Common questions about Phosphorus triiodide, answered from cross-validated data.
What is PI3?
Phosphorus triiodide is a stable semiconducting compound frequently employed as a chemical reagent in organic synthesis.
What is PI3 used for?
What is the band gap of PI3?
Is PI3 a metal, semiconductor, or insulator?
Is PI3 thermodynamically stable?
How many polymorphs of PI3 are known?
What elements does PI3 contain?
Where does the data for PI3 come from?
How It Compares
As a standalone phosphorus halide, phosphorus triiodide represents a key member of the phosphorus-iodine system, providing a distinct chemical reactivity profile compared to other phosphorus halides that are often used in similar synthetic pathways.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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