Journal ArticleDOI
Synthesis, characterization and catalytic activity of polynuclear manganese complexes of 2,5-dihydroxyterephthalaldehyde for epoxidation of olefins with H2O2
R. Krishnan,S. Vancheesan +1 more
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TLDR
In this paper, the effect of imidazole and olefin concentrations on effective oxygen transfer was studied under heterogenized homogeneous reaction conditions in the presence of a base.Abstract:
Polynuclear manganese complexes of 2,5-dihydroxyterephthalaldehyde (dhterH 2 ) and its Schiff base polymer ligand (PdhterenH 2 ) [Mn II (dhter)] n , [Mn n II (Pdhteren)] and [Mn n III (Pdhteren)(OAc) n ] were synthesized. The manganese complexes were characterized by elemental analysis, thermal analysis, IR and EPR spectroscopic techniques. Catalytic epoxidation of olefins with hydrogen peroxide was studied using the above manganese complexes under heterogenized homogeneous reaction conditions in the presence of a base. The effect of imidazole and olefin concentrations on effective oxygen transfer were studied. [Mn n II (Pdhteren)] and [Mn n III (Pdhteren)(OAc) n ] are more efficient than the oxygen-bonded manganese complex [Mn II (dhter)] n for the activation of hydrogen peroxide.read more
Citations
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Journal ArticleDOI
Metal-Catalyzed Epoxidations of Alkenes with Hydrogen Peroxide
Benjamin S. Lane,Kevin Burgess +1 more
TL;DR: Metal Oxides Generated in Situ 2461 4.1.
Journal ArticleDOI
Manganese-catalyzed epoxidations of alkenes in bicarbonate solutions.
TL;DR: This paper describes a method, discovered and refined by parallel screening, for the epoxidation of alkenes that uses hydrogen peroxide as the terminal oxidant, is promoted by catalytic amounts (1.0-0.1 mol %) of manganese(2+) salts, and must be performed using at least catalysttic amounts of bicarbonate buffer.
Journal ArticleDOI
Imine Oligomers and Polymers
TL;DR: In this paper, the synthesis methods of polyimines by polycondensation, using diamines or hydrazine and dialdehydes, or by chemical and electrochemical polymerization of imine oligomers containing terminal oxidable groups (pyrrole, thiophene, furan, naphthalene, etc).
Journal ArticleDOI
Catalytic efficacy of Schiff-base copper(II) complexes: Synthesis, X-ray structure and olefin oxidation
Chandan Adhikary,Rajesh Bera,Buddhadeb Dutta,Sreyashi Jana,Gabriele Bocelli,Andrea Cantoni,Siddhartha Chaudhuri,Subratanath Koner +7 more
TL;DR: Three copper(II) Schiff-base complexes, [Cu(L1)(H2O)](ClO4) (1), [cu(L2)] (2) and [Cu (L3)] (3), have been synthesized and characterized by single crystal X-ray diffraction analysis.
Journal ArticleDOI
Characterization of oxovanadium (IV)–Schiff-base complexes and those bound on resin, and their use in sulfide oxidation
TL;DR: The polymer-supported Schiff-base complexes in the presence of tertiary -butylhydroperoxide converted the sulfide to the corresponding sulfoxide in 80-90% yield in CDCl 3 in 90 min this article.
References
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TL;DR: In this article, the normal modes of vibration are illustrated and corresponding vibrational frequencies are listed for each type, including diatomic, triatomic, fouratomic, five-atomic, six-atomic and seven-atomic types.
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Metalloporphyrins as versatile catalysts for oxidation reactions and oxidative DNA cleavage
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Catalytic asymmetric oxidations using optically active (salen)manganese(III) complexes as catalysts
TL;DR: In this paper, the authors dealt with enantioselective one oxygen atom transfer reactions (epoxidation, oxidation of enolates, and oxidation of sulphide to sulphoxides) catlaysed by optically active (salen)manganese(III)complexes.