Synthesis and Characterization of Novel Carbacylamidophosphate Derivatives: Crystal Structures of (p‐Cl‐C6H4)C(O)NHP(O)(NC5H10)2and (p‐Br‐C6H4)C(O)NHP(O)(NC5H10)2

Using phosphorus pentachloride as a substrate, carbacylamidophosphates of the general formula (p‐X‐C6H4) C(O)NHP(O)(R)2; (X=Cl and R=Cl, 2a; X=Br and R=Cl, 3a; X=Me and R=Cl, 4a; X=Cl and R=piperidine, 2b; X=Br and R=piperidine, 3b; X=Me and R=piperidine, 4b; X=H and R=cyclohexylamine, 1c; X=Cl and R=cyclohexylamine, 2c; X=Br and R=cyclohexylamine, 3c; X=Me and R=cyclohexylamine, 4c; X=H and R=p‐Me‐cyclohexylamine, was prepared and characterized by 1H, 31P and 13C NMR and IR spectroscopy and elemental analysis. Different group attached on phosphorus nuclei affect on IR and NMR spectra. Three‐bond coupling constants between phosphorus and carbon nucleus, 3J(P,Caliphatic) in the 1b–4band 1c–4ccontaining piperidine or cyclohexylamine groups, were greather than two‐bond coupling constants, 2J(P,Caliphatic). The structures of 2band 3bwere determined by single‐crystal X‐ray diffraction techniques. The both molecule crystals are composed of a centrosymmetric dimer via N‐H···O bonds. 3bexists as two independent molecules in crystal lattice.