Thiophosphoryl bromide

There have apparently been no recent developments in reagents for desulphurizing sulphoxides that use pentavalent phosphorus compounds. Reagents that were reviewed in 1984 include phosphorus pentasulphide, thiophosphoryl bromide, Lawesson s reagent (1), and phosphorus pentachloride in the presence of a trap for CD ions. The traps used included an enamine or an N, JV-dialkylaniline. Presumably, the net effect of this reaction is to generate phosphorus trichloride in situ. The three thiophosphorus reagents obviously function because the P=S bond is some 150 kJ moD weaker than the P=0 bond . 

Deoxygenation of sulfines. Sulfines are converted to thiones by reaction with P4S10 in CH2C12 for 1 48 hours at 25°. The homogeneous reagent thiophosphoryl bromide, PSBr,2 is somewhat more reactive, but work-up is more difficult. 

Thiocyanogen solution, 1 84, 86 standardization of, 1 86 Thionyl bromide, 1 113 Thionyl fluoride, 6 162 Thiophosphoryl bromide, 2 153 Thiophosphoryl chloride, 4 71 Thiophosphoryl triamide, 6 111 Thiosemicarbazide, 4 39... 

Thiophosphoryl bromide dissolves sulphur and mixes with other halides such as phosphorus trichloride, also with ether, chloroform and carbon disulphide.10... 

Thiophosphoryl bromide, PSBrs. Mol. wt. 302.76, m.p. 38°. Supplier Alfa. The reagent is prepared from red phosphorus, bromine, and phosphorus pentasulfide (67% yieid). ... 

Thiophosphonic and thiophosphinic chlorides are also amenable to the reaction, and this permits preparation of unsymmetrical phosphine sulfides. Thiophosphonic and thiophosphinic bromides can be obtained analogously from thiophosphoryl bromide and aluminum bromide. 

Thiophosphoryl bromide can be obtained by the reaction of phosphorus pentasulfide with phosphorus pentabromide ... 

Thiophosphoryl bromide PSBr3, is a pale yellow solid, mp = 37.8°C, d =1 2°C, which can be made by reacting P4S10 with the pentabromide (as 4.96). The unstable iodide, PSI3, can be obtained by reacting PI3 with sulphur in CS2 at 10°C in the absence of light. The compound decomposes at room temperature. 

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