DiPhosphorus pentasulfide

The benzodiazepinedione 7 is converted into the monothione 8 by the action of diphosphorus pentasulfide.282... 

The 4-oxo-group of the 4-oxo-4//-pyrido[l,2-a]pyrimidines was transformed to a thioxo group by diphosphorus pentasulfide in pyridine,2 49 71 Under similar conditions the oxygen to sulfur exchange could not be achieved... 

Substitution of the phosphinate ester group by dimethylamine via the chloride, and thionation of the P=0 group of the 2-phosphabicyclo[2.2.2]octane P-oxide derivatives 28 with diphosphorus pentasulfide affords the corresponding amide 29 and P-sulfide 30 (Scheme 10). The thionation is also achieved with Lawesson s reagent [7,8]. Thermolysis of 28 proceeds a retro Diels-Alder reaction to give 31. 

Write a formula for each of the following compounds (a) diphosphorus pentasulfide, (b) iodine heptafluoride, and (c) dinitrogen monoxide. 

Problem 0.800 mole of phosphorus was reacted with an excess of sulfur to form diphosphorus pentasulfide, P2S5. 

SYNONYMS diphosphorus pentasulfide, phosphoric sulfide, phosphorus persulfide, phosphorus sulfide, suflur phosphide, thiophosphoric anhydride. 

Out of the 33 substances, 17 were already listed in directive 91/322/EEC. Eor 4 of the 17 chemicals the Emit value was changed as a result of new scientific data (nitrobenzene, diethylamine, cyanamide, pyrethrum). The values of the other 13 substances remained unchanged and are confirmed (nicotine, formic acid, methanol, acetonitrile, resorcinol, carbon dioxide, oxahc acid, diphosphorus pentoxide, diphosphorus pentasulfide, silver, barium, bromine, and phosphorus pentachlor-ide). As a result, the 17 substances were removed from the annex to directive 91/ 322/EEC (see Table 6.6). 

Synonyms Diphosphorus pentasulfide Phosphoric sulfide Phosphorus persulfide Phosphorus sulfide Sulfur posphide Thiophosphoric anhydride... 

Write a formula for each molecular compoimd. (a) carbon monoxide (b) disulfur tetrafluoride (c) dichlorine monoxide (d) phosphorus pentafluoride (e) boron tribromide (f) diphosphorus pentasulfide 74. Write a formula for each molecular compound. (a) chlorine monoxide (b) xenon tetroxide (c) xenon hexafluoride (d) carbon tetrabromide (e) diboron tetrachloride (f) tetraphosphorus triselenide... 

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