Synthesis, spectroscopic characterization and structural studies of nickel complexes of O,O′-diaryl(dibenzyl) dithiophosphates: Crystal structures of Ni[S2P(OC6H4CH3-o)2]2, Ni[S2P(OC6H4CH3-m)2]2 and Ni[S2P(OCH2Ph)2]2

O,O′-Dimethyl diphenyldithiophosphates of nickel(II) with N-donor ligands

“…In the complexes 1, 2, 3 and 4, the Ni-N1 bond distances are 2.0961(17), 2.108(2), 2.108(12), and 2.098(2) Å , which are comparable with the corresponding octahedral Ni-N bond distances reported for Ni[S 2 P(OC 6 H 4 Me-p) 2 ] 2 (C 10 H 8 N 2 ) (2.060(1) Å ) [14] and [[ (3,5- [30]. The Ni-S1 and Ni-S2 bond lengths for the complex 1 are 2.5061 (5) [10]. This shows that adduct formation reduces the net positive charge on the N atom and increases the net negative charge on the S atoms [30,31].…”

“…2, -y, -z [10], S1-P1-S2 bond angles are 102.65(5)°and 103.32(3)°, respectively, which are very small when compared to angles present in complexes 1-4. It reveals that coordination of aromatic N-donor ligand with nickel atom caused widening of S1-P1-S2 bond angle due to steric and electronic effect of Lewis base and also resulted in decrease in S1-Ni-S2 bond angle [31].…”

“…The characteristic stretching bands in the IR spectra were assigned by comparison with literature data [10,14,29,30]. In the complex 4 the band at 1120 and 854 cm -1 may be ascribed to the [m(P)-O-C] and [mP-O-(C)] vibrations of the diphenyldithiophosphate moiety, respectively.…”

“…The family of nickel(II) dithiophosphates have been intensively investigated structurally [3]. The homoleptic dithiophosphates Ni[S 2 P(OR) 2 ] 2 (R = Me [4], Et [5], n-Pr [6], iso-Pr [7], iso-Bu [8], cyclo -C 6 H 11 [9], benzyl, ortho-tolyl, meta-tolyl [10], para-tolyl [11] ) are square-planar complexes. Many six-coordinated adducts like Ni[S 2 P(OR) 2 ] 2 Á2L (L = pyridine [12,13], 2,2 0 -bipyridyl [14], 1,10-phenanthroline [15][16][17][18], 2,9-dimethyl-1,10-phenanthroline [19] ) have been reported.…”

Synthesis and characterization of bis(O,O′-diisopropylmonothiophosphato)nickel(II) adducts and molecular structures of bis(pyridine)bis(O,O′-diisopropylmonothiophosphato)nickel(II) complex

“…3 T 1 g(P) in the ranges 1,128-1,105, 735-652, and 453-420 nm, respectively, consistent with octahedral coordination. Almost identical electronic transitions were observed for the octahedral bis(O,O 0 -diaryldithiophosphato)nickel(II) adducts [35].…”