Phosphorus-containing reagents configuration

DMSO is known to be an oxidant for thiophosphoryl compounds. Oxidation of the acid (90) (and its epimer) with this reagent occurs with about 90% inversion of configuration at phosphorus. Oxidation of OOO-triethyl phos-phorothioate with nitrosonium tetrafluoroborate yields bis(diethoxyphosphinyl) disulphide, whereas electrochemical oxidation at a platinum surface gives unidentified phosphorus-containing products. ... [Pg.124]

Octahedral, phosphorus-containing anions that are tris-chelates are chiral, and have recently found application for resolving enantiomers and as NMR shift reagents. We exemplify this with TRISPHAT (20.19). The presence of the electron-withdrawing substituents in TRISPHAT increases the configurational stability of the anion, i.e. the... [Pg.632]

White phosphorus is known to exist as a P4 molecule wliich is in a tetrahedral configuration containing an atom of phosphorus and an unshared pair of electrons at each apex. Therefore, this allotrope of phosphorus should be subject to easy attack by electrophilic reagents. It is somewhat surprising that only one such reaction has been reported When a solution of wliite phosphorus in carbon disulfide and one molar equivalent of AICI3 at -10 °C was treated witli... [Pg.44]

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