Phosphorus diiodide

Phosphorus trichloride reacts with iodine in warm glacial acetic acid solution, which on cooling 3delds orange crystals of phosphorus diiodide ... 

Phosphorus diiodide triselenide, 4624 Phosphorus pentachloride, 4177 Phosphorus tribromide, 0292 Phosphorus trichloride, 4147... 

Phosphorus Diiodide, P2I4, was first prepared by fusing the constituents in equivalent proportions.6 50 grams of iodine and 4 grams of red phosphorus are melted in a flask and, after partial cooling, 2-5 grams of white phosphorus are added in small pieces.7 Or, equal parts by weight of iodine and phosphorus are dissolved in carbon disulphide and the solution is cooled to 0° C., when the com-... 

Phosphoric add-Formic acid, 860 Phosphorodimorpholidic chloride, 861 Phosphorous add, 304 Phosphorus, red, 449, 861-864 Phosphorus diiodide, see Diphosphorus tetraiodide... 

The products are evidently determined by the thermodynamics of the reaction reactions of alkyl iodides with phosphorus diiodide or with equivalent mixtures of phosphorus and phosphorus triiodide give essentially identical results (19). Such reactions with simple alkyl iodides (methyl to pentyl), however, require temperatures in the range 200-220°. While good yields are generally obtained, the advantage of added iodine is uncertain. 

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