Synthesis and characterization of N-(2-pyridyl)benzamide-based nickel complexes and their activity for ethylene oligomerization

Nickel(II) complexes with imino-imidazole chelating ligands bearing pendant donor groups (SR, OR, NR2, PR2) as precatalysts in ethylene oligomerization

“…A series of nickel(II) complexes containing imino-imidazole ligands with a pendant donor group have been synthesized and (7) 173.41 (7) 98.62 (11) 89.56(11) Cl(3)eNi(1)eN (10) 97.53 (8) 102.49 (11) 97.51(13) Cl (2) (3) 83 Ellipsoids are drawn at a 50% probability level. fully characterized.…”

“…This leads to a distorted octahedral coordination geometry for the Ni center (Fig. 3), as evidenced by a Cl(3)eNi(1)eN(7) angle of 89.56 (11) . The molecule of MeOH is coordinated to the metal via a dative bond as established by the presence of a H atom on the oxygen and by the Ni(1)eO (20) distance (2.154(4) A) [23].…”

Palladium and nickel complexes of (P,N)-ligands based on quinolines: Catalytic activity for polymerization and oligomerization

“…Owing to their bonding versatility and the relative ease with which the electronic and steric properties of the donor atoms can be modified, (P,N)-ligands play an important role in the coordination chemistry of transition metals as well as in homogeneous catalysis [1][2][3][4][5][6][7][8][9]. Despite their widespread applications in asymmetric catalysis, the (P,N)-ligands, and especially those based on quinoline, have only recently begun to attract attention with respect to the late-transition-metal-catalyzed oligomerization, polymerization and copolymerization reactions of olefins [10][11][12][13][14][15][16]. These studies have demonstrated that the architecture of the ligand plays an important role in adapting the activity of the coordinated metal center.…”

“…Our aim was to determine how these properties are reflected in the activity of their palladium [Pd(P,N)(CH 3 )(NCCH 3 )](PF 6 ) (9-12) complexes toward copolymerization of styrene and ethylene with CO. The nickel complexes [Ni(P,N)(1-naphthyl)Cl] (13)(14)(15)(16), modified with the ligands 1-4, were also synthesized and their activity toward the oligomerization of ethylene was studied.…”

Vibrational spectroscopic studies and DFT calculations of 4‐fluoro‐N‐(2‐hydroxy‐4‐nitrophenyl)benzamide

“…For N-(2-pyridyl)benzamide complexes,56 the bond lengths for C 23 -O 24 , N 21 -C 23 , N 21 -C 11 and C 23 -C 3 are 1.2445, 1.3646, 1.4156 and 1.4816Å, respectively, while in the present case, these bond lengths are 1.2195, 1.3958, 1.4093 and 1.4977Å. For N-(2-pyridyl)benzamide complexes,56 the bond lengths for C 23 -O 24 , N 21 -C 23 , N 21 -C 11 and C 23 -C 3 are 1.2445, 1.3646, 1.4156 and 1.4816Å, respectively, while in the present case, these bond lengths are 1.2195, 1.3958, 1.4093 and 1.4977Å.…”