Catalytic oxidation of primary aromatic alcohols using half sandwich Ir(III), Rh(III) and Ru(II) complexes: A practical and theoretical study

Half‐sandwich ruthenium‐based versatile catalyst for both alcohol oxidation and catalytic hydrogenation of carbonyl compounds in aqueous media

“…The corresponding aromatic aldehydes and ketones were given in good yields ( 5a – k ). It is noteworthy that the reaction rates of the substrates with ortho ‐substituted groups ( 5f ) are comparable to those of para ‐substituted groups, and this result is different from the catalytic activity showed by the cationic N,N ‐chelate group 8 and 9 half‐sandwich transition metal complexes . However, 3, 5‐Me group‐substituted 1‐phenylethanol ( 5 l ) showed moderate conversion under the catalysis of complex 3 probably because of the steric effects.…”

Crystal structure of chlorido-(η 5-pentamethylcyclopentadienyl)-(4-chloro-4-pyridyl-2,2′:6′,2′′-terpyridine-κ2N,N′) rhodium(III) hexaflourophosphate, C31H29Cl2F6N3PRh

“…The pentamethyl cyclopentadienyl ligand has a wide application in organometallic chemistry. The η 5pentamethylcyclopentadienyl rhodium complexes have found utility in coordination chemistry and catalysis [5][6][7]. The reactions of the chloride-bridged rhodium dimer [Cp * RhCl 2 ] 2 with a variety of ligands to form monomeric complexes via cleavage of the bridging species readily incorporate many diffent ligands [5][6][7].…”

Electrochemistry of a series of symmetric and asymmetric CpNiBr(NHC) complexes: Probing the electrochemical environment due to push-pull effects

“…A simple plot of molecular orbital energies of complexes 1-9 clearly illustrated the effect of the electron-withdrawing 4-NO2-benzyl substituent ( Figure 10): A slight lowering of HOMO energies, combined with noticeable lowering of LUMO energies resulted in smaller HOMO-LUMO energy gaps, which necessarily indicate less stable and more reactive species for 6-9 [56]. This was also confirmed in catalytic studies involving complexes 1-9, where the 4-NO2Bn-containing Ni-NHC complexes exhibited the lowest substrate conversions along with the lowest TOFs in the Suzuki-Miyaura coupling of 4-chlorophenyl carboxaldehyde with phenylboronic acid [30], as well as in the anaerobic oxidation of secondary alcohols [31].…”