Diphosphorus
| |||
| Names | |||
|---|---|---|---|
| IUPAC name
Diphosphorus
| |||
| Systematic IUPAC name
Diphosphyne[1] | |||
| Identifiers | |||
3D model (
JSmol ) |
|||
| ChEBI | |||
| ChemSpider | |||
| 1400241 | |||
PubChem CID
|
|||
| |||
| |||
| Properties | |||
| P2 | |||
| Molar mass | 61.947523996 g·mol−1 | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |||
Diphosphorus is an
dinitrogen. The bond distance has been measured at 1.8934 Å.[2]
Synthesis
Diphosphorus has been generated by heating
complexes (based on, for example, tungsten and niobium).[3] Methods for dissociation of bonds in P4 molecules via photoexcitation were also proposed.[4]
The molecule attracted attention in 2006, when a new method for its synthesis at milder temperatures emerged.[3] This method is a variation on nitrogen expulsion in azides with formation of a nitrene. The synthesis of the diphosphorus precursor consists of reacting a terminal niobium phosphide with a chloroiminophosphane:
Heating this compound at 50 °C in
Diels–Alder adduct
and the niobium imido compound:
The same imido compound also forms when the
thermolysis is performed in toluene
, but in this case the fate of the diphosphorus is unknown.
P2 has been suggested to form as an intermediate in the
2,3-dimethyl-1,3-butadiene the diphosphane resulting from Diels–Alder addition is again formed.[6]
To date, no direct evidence of P2 formation via P4 photolysis exists.
The generation of diphosphorus from a diphosphorus bisanthracene adduct has been reported.[7] The synthesis of a stabilized HP2+ cation has been reported.[8]
References
- ^ "Diphosphorus (CHEBI:33472)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute.
- ISBN 978-0442233945.
- ^ S2CID 27740669.
- hdl:1721.1/90977. Archived from the originalon 2017-07-21. Retrieved 2017-07-21.
- .
- PMID 20799313.
- ^ A Retro Diels–Alder Route to Diphosphorus Chemistry: Molecular Precursor Synthesis, Kinetics of P2 Transfer to 1,3-Dienes, and Detection of P2 by Molecular Beam Mass Spectrometry Alexandra Velian, Matthew Nava, Manuel Temprado, Yan Zhou, Robert W. Field, and Christopher C. Cummins Journal of the American Chemical Society 2014 136 (39), 13586-13589
External links
- Ron Dagani, "A Mild Route To P2", Chemical & Engineering News September 4, 2006 Link
- Carmen Drahl "Flash Of Phosphorus Chemistry Innovation", Chemical & Engineering News September 13, 2010 Link