Synthesis, characterization and complexation properties of N-phosphorylated thioureas RNHC(S)NHP(O)(OiPr)2 (RÂ =Â 2-Py, 3-Py) towards Ni(II)

Reaction of (iPrO)2P(O)NCS with 2- or 3-aminopyridine leads to the new N-phosphorylated thioureas RNHC(S)NHP(O)(OiPr)2 (R = 2-Py, HLI; 3-Py, HLII). Reaction of the potassium salt KLI with Ni(II) in aqueous EtOH leads to the new complex Ni[2-PyNHC(S)NP(O)(OiPr)2-N(Py),N(P),O]2, where the metal cation is coordinated by the two deprotonated ligands LI through the pyridine and phosphorylamide nitrogen atoms, and the PO oxygen atoms. Using KLII leads to the polymeric structure, where the Ni(II) cation is coordinated by the two anionic ligands LII through the CS sulfur atoms and the P-N nitrogen atoms, and the pyridine nitrogen atoms of neighboring molecules.