Khodayar Gholivand - Department of Chemistry, Faculty of Science, Tarbiat Modarres University, Tehran, Iran,
Fresia Mojahed - Department of Chemistry, Faculty of Science, Tarbiat Modarres University, Tehran, Iran,

Using phosphoryl chloride as a substrate, a derivative of 1 3 2-bis(arylamino) phoipholidine, ?-oxide of the general formula (x)(o-2~(~r) ;(X-CI, la; X-.N(CH2C6Hj)(CH3), 2b was prepared. The structures of the la and 2b were determined by single-crystal X-ray diffraction techniques. The crystal structures of la and 2a consist w e - m e m b e r e d ring containing phosphorus, nitrogen and carbon atoms in a fashion PNCCN. The 2a exists as two independent ~nolecules in crystalline lattice, arising from the different orientation of methyl benzyl amine group