478548-99-1Relevant articles and documents
Mixed-ligand platinum(II) complexes containing 2-(2′-pyridyl)phenyl and 8-quinolylphosphines: Synthesis and molecular structures in the crystals and in solution
Mori, Masatoshi,Suzuki, Takayoshi
, (2020)
A series of cyclometalated {2-(2′-pyridyl)phenyl}platinum(II) complexes having 8-quinolylphosphines, 8-(dimethylphosphino)quinoline (L1), 8-(diphenylphosphino)quinoline (L2), 2-methyl-8-(diphenylphosphino)quinoline (L3), and 2-phenyl-8-(diphenylphosphino)quinoline (L4), were prepared and their molecular structures and spectroscopic properties were investigated. The single-crystal X-ray analysis and the 31P{1H} NMR spectra of the products, [Pt(ppy)(Ln)](BF4 or OTf) {Cn; n = 1–4, ppy? = 2-(2′-pyridyl)phenyl, OTf? = trifluoromethanesulfonate} revealed the cis(P,C) configuration of the complex cations, although the square-planar PtII coordination geometry was considerably distorted. In particular, in the complexes C3 and C4 bearing sterically demanding 8-quinolylphosphines (L3 and L4), not only the tetrahedral distortion of the PtII coordination sphere but also a deviation of the PtII center from the planar chelate ring, i.e., an envelope-type distortion of the chelating quinolylphosphine coordination was observed. All complexes were stable in solution toward the addition of halide anions. However, a fluxional behavior of complexes C3 and C4, owing to the restricted inversion of the distorted coordination sphere, was observed in the temperature-dependent 1H NMR spectra.
Synthesis and characterization of novel nickel(II) complexes bearing N,P ligands and their catalytic activity in ethylene oligomerization
Sun, Wen-Hua,Li, Zilong,Hu, Huaiming,Wu, Biao,Yang, Haijian,Zhu, Ning,Leng, Xuebing,Wang, Honggen
, p. 1474 - 1478 (2007/10/03)
The novel chloro(1-naphthyl)[8-(diphenylphosphino)quinoline]nickel(II) (1), chloro(1-naphthyl)[2-methyl-8-(diphenylphosphino)quinoline]nickel(II) (2), and [2-methyl-8-(diphenylphosphino)quinoline]nickel(II) dichloride (3) complexes were synthesized in satisfactory yield and fully characterized. The structures of complexes 1 and 3 were determined by single crystal X-ray analysis, which indicated that complex 1 exists in a square planar configuration, while complex 3 is dimeric square pyramidal. In the presence of MAO cocatalyst, complexes 1-3 displayed good catalytic activities for ethylene oligomerization in toluene, up to 2.45 × 105 g ethylene (mol Ni·h·atm)-1 by complex 3.
