No abstract

The stereoisomers la and lb open the possibility to determine the contribution of the 3s and 3p character of phosphorus in a trigonal-bipyramidal (TBP) configuration. The ESR experiments clearly show that there is a small excess of 3s spin density in the equatorial ligand in comparison with the apical one. Although this result does not conflict with the physical and chemical properties of phosphorus in a TBP, it refines the established idea that the sp1 23

No abstract

It is shown that the factors which determine the E.s.R. studies on phenylphosphoranyl-radicals show that stereoisomerisation of phenylphosphoranyl-radicals are the electronic nature of the other ligands prescribes the similar to those determining the pseudorotation of P V valence state of phosphorus in these radicals.1-3 If one of phosphoranes.these ligands is highly electron-withdrawing (CF,CH,O, C1,

Compound (2) was prepared according to the method of D. Houalla, T.