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Phosphorus trifluoride : ウィキペディア英語版 | Phosphorus trifluoride
|Section2= |Section3= |Section7= |Section8= }} Phosphorus trifluoride (formula PF3), is a colorless and odorless gas. It is highly toxic and reacts slowly with water. Its main use is as a ligand in metal complexes. As a ligand, it parallels carbon monoxide in metal carbonyls, and indeed its toxicity is due to its binding with the iron in blood hemoglobin in a similar way to carbon monoxide. ==Physical properties== Phosphorus trifluoride has a bond angle of 107°, F-P-F bond angle being 96.3°. Gaseous PF3 has a standard enthalpy of formation of -945 kJ/mol (-226 kcal/mol). The phosphorus atom has a nuclear magnetic resonance chemical shift of 97 ppm (downfield of H3PO4).
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