2,6-Dibenzhydryl-N-(2-aryliminoacenaphthylenylidene)-4-chlorobenzenamino-palladium dichlorides: Synthesis, characterization, and use as catalysts in the Heck-reaction

Ferrous complexes supported by sterically encumbered asymmetric bis(arylimino)acenaphthene (BIAN) ligands: synthesis, characterization and screening for catalytic hydrosilylation of carbonyl compounds

“…A closer look at the IR data revealed that all the six Fe compounds showed comparable C]N vibration frequencies (Dn(C]N) < 10 cm À1 ), indicating the presence of similar electronic structures across this series of metal complexes. Furthermore, the C]N stretching frequencies of these Fe species were consistent with the reported values for the Ni and Pd complexes bearing the same ligand sets, [42][43][44][45] but lower than that reported for analogous Fe compounds with symmetric BIAN ligands. 21 The electronic structures of the BIAN supported Fe complexes were also probed by UV-vis spectroscopy.…”

“…The asymmetric bulky BIAN ligands are facile to prepare via stepwise condensation of acenaphthaquinone with anilines under acid-catalyzed conditions (Scheme 1). [42][43][44][45] In the current study, we chose to employ BIAN ligands that have two different substituted aryl groups on the N donor atoms. In a certain ligand framework, one of the nitrogen atoms is substituted with Mes or Dipp group, while the other N atom is bonded to a sterically encumbered 2,6-dibenzhydryl phenyl group (Ar*), whose para-position is occupied by different electron donating or withdrawing groups (-F, -Cl or -Me).…”

“…In recent years, 2,6-dibenzhydryl phenyl substituents (abbreviated as Ar*) were introduced to the BIAN ligand framework by Sun and others, and their nickel and palladium complexes were demonstrated to be effective catalysts for either ethylene polymerization or C-C cross coupling reactions. [39][40][41][42][43][44][45] Following our previous assumption, herein we report the synthesis of a series of Fe(II) complexes supported by sterically hindered BIAN ligands (Ar-BIAN X )FeCl 2 (Ar ¼ Dipp, X ¼ F (1), Cl (2), Me (3); Ar ¼ Mes, X ¼ F (4), Cl (5), Me (6)). The solid-state structures of the six compounds were determined by single crystal X-ray diffraction, rendering them rare examples of structurally characterized iron complexes with asymmetric BIAN ligands.…”

Schiff bases and their amines: Synthesis and discovery of carbonic anhydrase and acetylcholinesterase enzymes inhibitors

“…Schiff bases form stable complexes with most of transition metals owing to their strong coordinative ability. The catalytic and biological properties of Schiff bases and their metal complexes have been extensively studied . They have been shown to exhibit a broad range of biological activities such as antibacterial, antifungal, antimalarial, anti‐inflammatory, and antiviral activities .…”

Geometry Constrained N-(5,6,7-Trihydroquinolin-8-ylidene)arylaminopalladium Dichloride Complexes: Catalytic Behavior toward Methyl Acrylate (MA), Methyl Acrylate-co-Norbornene (MA-co-NB) Polymerization and Heck Coupling

“…Both complexes Pd4 and Pd5 displayed a similar molecular structure that adopts a distorted square planar geometry around the palladium metal center and the square plane is comprised of two nitrogen atoms from the ligand as forming a chelate ring with Pd metal center and two chloride atoms. The structural features correspond to classical N,N-bidentate palladium complexes [51][52][53][54][55][56]. The molecular structures of Pd4 and Pd5 are shown in Figure 2 and the selected bond lengths and bond angles are listed in Table S1 (ESI).…”