Synthesis, spectral characterization, catalytic andbiological studies of new Ru(II) carbonyl Schiff base complexes of active amines

Abstract

The synthesis and characterization of several hexa – coordinated Ru(II) complexes of the type [Ru(CO)(B)(L)] (B = PPh<sub>3</sub>/AsPh<sub>3</sub>/py/pip; L = di-basic tetradentate ligand derived from the condensation of isatin with diamines) were reported. IR, electronic, <sup>1</sup>H- NMR, <sup>31</sup>P-NMR of the complexes are discussed. An octahedral geometry has been tentatively proposed for all these complexes. The new complexes have been tested for the catalytic activity in the reaction of oxidation of alcohols in the presence of N-me- thylmorpholine–N-oxide as co-oxidant. The new complexes were also exhibited antimicrobial investigations

Ru(II)–halide–carbonyl complexes of naphthylazoimidazoles: Synthesis, spectra, electrochemistry, catalytic activity and electronic structure

“…Out of these five alcohols cyclohexanol and 1-phenylethanol show higher product conversion ratio than others and least activity is observed for 2-butanol. The compounds reported in this article show comparable catalytic efficiency with reported catalysts for supporting oxidation of alcohols by NMO or peroxides such as Ruazophelato compounds [47] or Ru-Schiff bases [48].…”

Alcohol oxidation reactions catalyzed by ruthenium–carbonyl complexes of thioarylazoimidazoles

“…[RuCl(CO)(PPh 3 )(S κ RaaiNR / )](PF 6 ) ( 3 ) has better catalytic activity compared to [RuH(CO)(PPh 3 ) 2 (SRaaiNR′)](PF 6 ) ( 2 ) in the presence of NMO. The catalytic oxidation properties of ruthenium(II) carbonyl complexes containing bidentate NN, NO, OO, tridentate NNN, ONO, ONS and tetradentate NNNN, NNOO donor ligands have been much studied . Ru―NHC complexes were recently described as useful catalysts in the alcohol oxidation process .…”

Synthesis, characterization and antibacterial studies of tetradentate schiff base and their metal (II) complexes derived from 4-(Benzeneazo salicylaldehyde and ethylenediamine)

“…The appearance of weak absorption bands in all the metal complexes at the range of 592 -574 cm -1 can be attributed to the stretching vibration of Metal -Nitrogen (M -N) and also appearance of weak absorption bands at all the metal complexes at the range of 481-422cm -1 can be attributed to the stretching vibration of Metal-Oxygen (M-O) which is similar to what was obtained in the literatures (Deoghoria et al, 2004 Bagihalli andAvaji, 2008 and Shahabadi and Kashanian, 2010). The Molar conductance measurement in DMSO are in the range 7.5-10.1 ohm -1 cm 2 mol -1 (Table 3).These values are relatively low showed that the complexes are non electrolytes (Raju and Balasubramanian, 2011). The low values indicate that the compounds are neutral.…”