Ruthenium(II) and (III) bipyridine complexes and their catalytic oxidation properties for organic compounds

Ruthenium(II) complexes containing triphenylphosphine/triphenylarsine and bidentate Schiff bases derived from 2-hydroxy-1-naphthaldehyde and primary amines

“…All of the synthesised ruthenium complexes were found to catalyze the oxidation of alcohols to the aldehyde but the yield and turnovers were found to vary with different catalysts. The yields and turnover are comparable with those reported for the oxidation of alcohols by similar ruthenium(II) complexes [23]. It has also been found that triphenylphosphine complexes possess higher catalytic activity than the triphenylarsine complexes [24].…”

Complexes of a diacetylmonoxime Schiff base of S-methyldithiocarbazate (H2damsm) with Fe(III), Ru(III)/Ru(II), and V(IV); catalytic activity and X-ray crystal structure of [Fe(Hdamsm)2]NO3·H2O

“…This suggests the low-spin d 5 (t 2g ) 5 configuration for iron(III) or ruthenium(III) in an octahedral environment for the complexes (1) and (2), as is the case for related iron(III) and ruthenium(III) complexes [12,25,26]. The vanadium complex (5) is a 3d 1 system, while the other ruthenium complexes (3) and (4) were found to be diamagnetic and EPR silent, consistent with low-spin (4d 6 , t 2g 6 ) ruthenium(II) complexes.…”

“…The mixture was stirred at RT for 2 h, then evaporated to dryness and extracted with CH 2 Cl 2 (3 9 10 cm 3 ). The combined extracts were evaporated, and the aldehyde product was quantified as its 2,4-dinitrophenylhydrazone derivative [12,13] (equivalent to 1.8 mmol of benzaldehyde product was obtained). The same experiments were carried out for oxidation of cyclohexanol or using the other complexes (1, 2 and 5).…”

“…We also report the X-ray crystal structure of [Fe(Hdamsm) 2 ]NO 3 .H 2 O and study the catalytic activities of these metal complexes toward oxidation of alcohols in the presence of t-BuOOH and H 2 O 2 as co-oxidants in comparison with our previous work on catalytic oxidations by ruthenium(II) and (III) complexes [12,13].…”

Synthesis, characterization and catalytic studies of ruthenium(II) Schiff base complexes

“…All of the synthesised ruthenium complexes were found to catalyze the oxidation of alcohols to the aldehyde, but the yields and turnovers were found to vary with different catalysts. The yields and turnover reported for [Ru(bpy) 2 (acac)] (PF 6 ) and [Ru(bpy) 2 Cl 2 ](PF 6 ) in the presence of t-BuOOH (co-oxidant) are low compared to those found for new Ru II complexes ( Table 2) [25]. It has also been found that triphenylphosphine complexes possess higher catalytic activity than the triphenylarsine complexes [26].…”