ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
White phosphorus reacts with organic diselenides in a dipolar aprotic solvent in the presence of a base with the formation of tri(alkyl- or aryl-seleno)phosphites in good yield.\documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm P}_{\rm 4} + 6{\rm RSeSeR}\mathop \to \limits^{\rm B} 4({\rm RSe})_3 {\rm P} $$\end{document}Tri(methylseleno)phosphitc shows a 31P-chemical shift = -107 ppni (JP, 77Se = 233 Hz). It is readily oxidizcd in air to the corresponding selenophosphate, (CH3Se)3 P=O, 31P-chemical shift = -16 ppm.Tri(phenylseleno)phosphite reacts readily with mercury oxide to give the tri(phenylseleno)phosphate, a yellow solid of m.p. 105-110°. It also reacts with sulfur in refluxing benzene solution to give tri(phenylseleno)thiophosphate, also a yellow solid of m.p. 55-58°. However, an attempt to prepare tri(phenylseleno)selenophosphate failed. Under the same conditions as given above, white phosphorus also reacts with di-p-anisyl ditelluride to give tris(p-anisyltelluro)phosphite, shiny, rusty brown crystals which decompose rapidly at room temperature, but are stable for several months when kept in acetonc solution at -20°.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19760590129
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