Some new phosphoramidates with the general formula P(O)(X)[N(CH3)(CH2C6H5)]2, X=C6 H5C(O)NH (1), Cl (2), CCl3C(O)NH (3), N(CH3)2 (4) and 4-NO2–C6H4NH (5) were prepared and characterized by IR, 1H, 13C, 31P NMR spectroscopy and elemental analysis. The structures have been determined for compounds 1–3. Compounds 1 and 3 were obtained in the form of centrosymmetric dimers which were produced by intermolecular –P@O


H–N– hydrogen bonds. In molecules 1–5, containing carbon atoms with two bond distances from the phosphorus atoms, 2J(P,CH2) > 2J(P,CH3).

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