PHOSPHONIUM IODIDE
PHOSPHONIUM IODIDE Basic information
- Product Name:
- PHOSPHONIUM IODIDE
- Synonyms:
-
- iodinephosphide
- iodophosphorane
- jodphosphonium
- PHOSPHONIUM IODIDE
- Tetrahydridephosphorus iodide
- Phosphonium iodide ((PH4)I) (9CI)
- CAS:
- 12125-09-6
- MF:
- H4IP
- MW:
- 159.89
- EINECS:
- 235-189-0
- Mol File:
- 12125-09-6.mol
PHOSPHONIUM IODIDE Chemical Properties
- Melting point:
- 18.5° under its own vapor pressure
- Boiling point:
- 62.5°C (estimate)
- Density
- 2.860
- solubility
- reacts with H2O, ethanol
- form
- colorless tetragonal crystals
- color
- colorless tetragonal crystals, crystalline
- Water Solubility
- decomposed by H2O, alcohol, evolving phosphine gas [HAW93]
PHOSPHONIUM IODIDE Usage And Synthesis
Chemical Properties
large, transparent, colorless crystal(s); tetr; sublimes at room temp; decomposes to PH3 and HI when heated or in presence of alcohol or water; rapid heating causes detonation [MER06]
Physical properties
Colorless tetragonal crystal; deliquesces; density 2.86 g/cm3; sublimes at ordinary temperatures; vapor pressure 50 torr at 20°C, 760 torr at 61.8°C; melts at 18.5°C under its own vapor pressure; boils at 80°C; decomposes in water; soluble in acids and alkalies with decomposition; decomposes in ethanol.
Uses
In the laboratory preparation of phosphine.
Preparation
Phosphonium iodide may be prepared by the action of phosphine with dry hydrogen iodide:
PH3 + HI → PH4I
Solid phosphonium iodide may be produced in the laboratory by slowly and very cautiously adding water to an intimate mixture of white phosphorus and iodine. Also, this phosphorus-iodine mixture may be obtained by mixing solutions in carbon disulfide and carefully evaporating the solvent in a stream of inert gas:
P4 + I + H2O → PH4I + H3PO4
2P + I2 + 4H2O → PH4I + H3PO4 + HI
Also, the compound can be prepared by hydrolysis of a mixture of diphosphorus tetraiodide and white phosphorus:
P2I4 + P + H2O → PH4I + H3PO4.
Hazard
Phosphonium iodide detonates on rapid heating. It dissociates by water, alcohol or heat, evolving toxic phosphine gas.
PHOSPHONIUM IODIDE(12125-09-6)Related Product Information
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