Intramolecular hydrogen bond controlled coordination of N-thiophosphorylated thiourea 2,6-Me2C6H3NHC(S)NHP(S)(OiPr)2 with Ni(II)

Abstract

Reaction of O , O ′-diisopropylthiophosphoric acid isothiocyanate ( i PrO) 2 P(S)NCS with 2,6-dimethylaniline 2,6-Me 2 C 6 H 3 NH 2 leads to the new N -thiophosphorylated thiourea 2,6-Me 2 C 6 H 3 NHC(S)NHP(S)(O i Pr) 2 ( HL ). Reaction of the potassium salt of HL with Ni(II) in aqueous EtOH leads to the complex of formula [Ni(L- N , S ) 2 ] . The molecular structures of the thiourea HL and the complex [Ni(L- N , S ) 2 ] were elucidated by single crystal X-ray diffraction analysis, 1 H and 31 P NMR spectroscopy and microanalysis. In the complex [Ni(L- N , S ) 2 ] , the metal center is found to be in a square-planar N 2 S 2 environment formed by the C S sulfur atoms and the P–N nitrogen atoms of two deprotonated L ligands. The ligands are in a trans -configuration. Reaction of O , O ′-diisopropylthiophosphoric acid isothiocyanate ( i PrO) 2 P(S)NCS with 2,6-dimethylaniline 2,6-Me 2 C 6 H 3 NH 2 leads to the new N -thiophosphorylated thiourea 2,6-Me 2 C 6 H 3 NHC(S)NHP(S)(O i Pr) 2 ( HL ). Reaction of the potassium salt of HL with Ni(II) in aqueous EtOH leads to the complex of formula [Ni(L- N , S ) 2 ] . The molecular structures of the thiourea HL and the complex [Ni(L- N , S ) 2 ] were elucidated by single crystal X-ray diffraction analysis, 1 H and 31 P NMR spectroscopy and microanalysis. In the complex [Ni(L- N , S ) 2 ] , the metal center is found to be in a square-planar N 2 S 2 environment formed by the C S sulfur atoms and the P–N nitrogen atoms of two deprotonated L ligands. The ligands are in a trans -configuration.