Synthesis and crystal structures of new potential chelating sulfonylamidophosphate ligands

Abstract Sulfonylamidophosphates with formula PhSO 2 NHP(O)(OR) 2 (H L1 : R = PhCH 2 ; H L2 : R =  p -MeC 6 H 4 ) and ( p -C 6 H 4 SO 2 NHP(O)(OMe) 2 ) 2 (H 2 L3 ) were synthesized via a three-step procedure based on Kirsanov reaction. Sodium salts Na L1 , Na L2 and Na 2 L3 were prepared from the corresponding sulfonylamidophosphates to explore their acid nature of the imide nitrogen. The products were characterized by means of 1 H, 31 P NMR and IR spectroscopies and elemental analysis. Crystal structures of H L2 , H 2 L3 and Na L2 were determined using X-ray crystallography. H L2 produces a dimeric aggregate via intermolecular hydrogen bonding. In contrast, H 2 L3 and Na L2 form 1D polymeric chains.