Five- and six-coordinate vanadium(V) complexes with tridentate Schiff base ligands derived from S(+)-isoleucinol: Synthesis, characterization and catalytic activity in the oxidation of sulfides and olefins

Romanowski, Grzegorz; Kira, Jaromir; Wera, Michał

doi:10.1016/j.poly.2013.10.008

Cited by 35 publications

(9 citation statements)

References 51 publications

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“…Here, we studied the influence of the geometrical structure of the metal complex. As previously reported [79], [80], [81], formation of a metal-peroxo intermediate occurs in some oxidation reactions that shows the geometrical structure of the complex plays an important role in its catalytic activity. In the present study, according to Fig.…”

Section: Influence Of the Geometrical Structure Of The Catalystsupporting

confidence: 58%

Cobalt(II), copper(II), zinc(II) and palladium(II) Schiff base complexes: Synthesis, characterization and catalytic performance in selective oxidation of sulfides using hydrogen peroxide under solvent-free conditions

et al. 2015

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Section: Influence Of the Geometrical Structure Of The Catalystsupporting

confidence: 58%

Cobalt(II), copper(II), zinc(II) and palladium(II) Schiff base complexes: Synthesis, characterization and catalytic performance in selective oxidation of sulfides using hydrogen peroxide under solvent-free conditions

et al. 2015

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“…However, in the case of cis ‐cyclooctene oxidation, a high selectivity was found for the epoxide formation. Also, a good selectivity towards the epoxidation of alkenes was achieved using compound 1 as a catalyst …”

Section: Schiff Base Complexes As Catalystsmentioning

confidence: 99%

“…Also, a good selectivity towards the epoxidation of alkenes was achieved using compound 1 as a catalyst. [44] A series of V(V) complexes were prepared with chiral tridentate Schiff base ligands, obtained by a single condensation of R-(−)-1-amino-2-propanol with salicylaldehyde and its derivatives. These complexes have the ability to catalyze the oxidation of sulfides (PhSR; R = Me, Bz) in good yields and enantiomeric excesses, utilizing aqueous 30% H 2 O 2 or cumene hydroperoxide (CHP) as oxidant (Figure 24(b)).…”

Section: Figure 16mentioning

confidence: 99%

Schiff base complexes and their versatile applications as catalysts in oxidation of organic compounds: part I

Zoubi

2016

Applied Organom Chemis

103

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Schiff bases and their complexes are good candidates as versatile compounds which are synthesized by the condensation of a primary amino compound with either aldehydes or ketones for a variety of industrial applications. They can act as catalysts in the catalytic oxidation of organic compounds. Recent researches in oxidation catalysis have focused on how to employ the metal‐catalyzed oxidation of organic substrates. This review summarizes the current developments of the last few decades for the oxidations of organic compounds that proceed through Schiff base complexes. The chemical syntheses of Schiff bases and their complexes are outlined.

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“…In recent years, Schiff bases and their metal complexes in the presence of ionic liquids (ILs) have presented great potential in attractive oxidation catalytic processes. Transition metal complexes of Schiff bases and extensively used as oxidation catalysts in many reactions, − and it has been observed that ionic liquids enhance the efficiency and recovery of catalysts . It has also been reported that the transition metal complexes of the Schiff base + IL system is used to oxidize sulfides to enantiopure sulfoxides .…”

Section: Introductionmentioning

confidence: 99%

Densities and Viscosities of Ternary N,N′-Bis(2-pyridylmethylidene)-1,2-diiminoethane Schiff Base + Imidazolium Based Ionic Liquids + Acetonitrile Solutions at T = (298.15 to 313.15) K

2015

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The effect of some imidazolium based ionic liquids including 1-propyl-3-methylimidazolium bromide ([PMIm]Br), 1-pentyl-3-methylimidazolium bromide ([PnMIm]Br), 1-hexyl-3-methylimidazolium bromide ([HMIm]Br), and 1-hexyl-3-methylimidazolium chloride ([HMIm]Cl) on the volumetric and viscometric properties of N,N′-bis(2-pyridylmethylidene)-1,2-diiminoethane Schiff base (BPIE) in acetonitrile (CH3CN) solutions was studied at T = (298.15 to 313.15) K. The measured densities were used to calculate apparent molar volumes (V ϕ) which were utilized to obtain standard partial molar volumes (V ϕ 0) of the ionic liquids. The temperature dependence of the V ϕ 0 values was examined by determination of partial molar expansivity (E ϕ 0 = (∂V ϕ 0/∂T) P ) and thermal expansion coefficient at infinite dilution (α = E ϕ 0/V ϕ 0)). Moreover, the pair (V SIL) and triplet (V SSIL) interaction coefficients were estimated based on McMillan and Mayer’s theory. The calculated Helper’s constants ((∂2 V ϕ 0/∂T 2) P ) indicate that the ionic liquids being studied behave as a structure-breaker in the solutions. To confirm the volumetric results, viscosities of the solutions were measured using an Ubbelohde-type viscometer. The viscosity values were used to calculate viscosity B-coefficients by the Jones–Dole equation and the solvation numbers (B/V ϕ 0) of the ionic liquids in the solutions. The effect of anion and cation size of ionic liquids on the calculated parameters was also examined. The results were used to deduce various interactions in the ternary solutions. It is concluded that the Schiff base–IL interactions are strengthened as the Schiff base concentration increases in the solution.

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Five- and six-coordinate vanadium(V) complexes with tridentate Schiff base ligands derived from S(+)-isoleucinol: Synthesis, characterization and catalytic activity in the oxidation of sulfides and olefins

Cited by 35 publications

References 51 publications

Cobalt(II), copper(II), zinc(II) and palladium(II) Schiff base complexes: Synthesis, characterization and catalytic performance in selective oxidation of sulfides using hydrogen peroxide under solvent-free conditions

Cobalt(II), copper(II), zinc(II) and palladium(II) Schiff base complexes: Synthesis, characterization and catalytic performance in selective oxidation of sulfides using hydrogen peroxide under solvent-free conditions

Schiff base complexes and their versatile applications as catalysts in oxidation of organic compounds: part I

Densities and Viscosities of Ternary N,N′-Bis(2-pyridylmethylidene)-1,2-diiminoethane Schiff Base + Imidazolium Based Ionic Liquids + Acetonitrile Solutions at T = (298.15 to 313.15) K

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