Three new [3-NO2-C6H4C(O)NH]P(O)[NRR']2 (NRR' = N(C2H5)(C6H11),NC4H8O & NC5H9-4-CH3) phosphoric triamide structures

In this work, we report on the synthesis, spectroscopic characterization and X-ray crystal structure determination ofthree new [3-NO2-C6H4C(O)NH]P(O)[NRR']2 [NRR' = N(C2H5)(C6H11) (1), NC4H8O (2) and NC5H9-4-CH3 (3)]phosphoric triamides. In all three compounds, the P–NCP bond length (NCP is the nitrogen atom of the C(O)NHP(O)segment) is longer than the two other P–N bond lengths, because of the resonance interaction of the NCP lone pair with the system of C═O group that causes a partial multiple bond character in C–NCP (the C–NCP bond length is shorter than theother C–N bond lengths in each structure). The OPNCP angle is less than the two OPN angles. All of the compounds areaggregated as centrosymmetric dimers via pairs of intermolecular NCP–H…O═P hydrogen bonds.