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DemoPresentation - . Whitephosphorus(P4)....

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Allotropes of Phosphorus Phosphorus has at least 12 allotropes. Most common are white and red phosphorus. Black phosphorus is most stable. White phosphorus (P 4 ) ignites spontaneously in air. Used in military weapons and smoke devices. Highly toxic, reacGve with halogens and metals. Synthesis: Oxidant: P in Ca 3 (PO 4 ) 2 Reductant: C P P P P White P P P P P P P P P P P P P P P P ' P P P P P P '' Red White P Red P 540 K inert atmosphere Ch102 Sample PresentaGon by Wilson Ho P P P P P P P P P P P P P Black Red phosphorus structure consists of chains, perpendicularly cross‐linked at the P ‐P juncGon (the P is in a different chain). Not toxic, less reacGve than white form toward halogens and metals, and also less flammable. Synthesis: Black phosphorus is similar to graphite in structure and physical properGes (black, smooth, and electrically conducGve). Not toxic, nonflammable, chemically inert up to high
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