Towards a global greener process: from solvent-less synthesis of molybdenum(vi) ONO Schiff base complexes to catalyzed olefin epoxidation under organic-solvent-free conditions

Abstract

Schiff base ligands and corresponding molybdenum(vi) complexes, prepared using classical and/or mechanochemical methods, were active as epoxidation pre(catalysts).

Catalytic activity of nickel(II), copper(II) and oxovanadium(II)‐dihydroindolone complexes towards homogeneous oxidation reactions

“…Particularly, optimization of the catalytic potentials in redox processes is typically enhanced through the structural environment of the metal–ligand complexes, as catalysts. Therefore, ligand frameworks with O , O ‐donor centers that could be sterically and electronically modified, are very highlighted for that propose . One of the most problem facing chemists in homogenous catalytic redox processes is the presence of toxic organic solvents, e.g .…”

“…acetonitrile. Recently, most of the fundamental research in catalytic redox processes carried out under organic solvent‐free conditions …”

New magnetic supported hydrazone Schiff base dioxomolybdenum (VI) complex: An efficient nanocatalyst for epoxidation of cyclooctene and norbornene

“…It is well known that Mo (VI) complexes are useful homogeneous catalysts for oxidation of alkenes . Despite the high catalytic potential of homogeneous catalysts, they suffer from some disadvantages involving difficulty in separation and recycling, instability at high temperature and deactivation of the catalyst through formation of oxo‐bridges by dimerization.…”

“…[25] It is well known that Mo (VI) complexes are useful homogeneous catalysts for oxidation of alkenes. [26][27][28][29] Despite the high catalytic potential of homogeneous catalysts, they suffer from some disadvantages involving difficulty in separation and recycling, instability at high temperature and deactivation of the catalyst through formation of oxo-bridges by dimerization. To solve these drawbacks which make them inappropriate for industrial applications, attention is focused on the heterogenization of homogeneous catalysts onto/in solid supports, such as zeolites, [30][31][32][33][34] multi-walled carbon nanotubes, [35,36] boehmite, [37,38] polymers [39][40][41][42][43][44] and graphene oxide.…”

A mixed‐ligand quinazoline‐based Ni(II) Schiff base complex: Synthesis, characterization, crystal structure, antimicrobial investigation and catalytic activity for the synthesis of 2H–indazolo[2,1‐b]phthalazine‐triones

“…Tridentate Schiff base ligands with ONO donor atoms have attracted much attention due to their rich coordination chemistry . Transition metal complexes with these chelating agents have been widely used in different fields including biochemistry and catalysis . Nickel (II) ion with intrinsic capability to adopt diverse geometries has versatile coordination chemistry which is important for both inorganic chemistry and biochemistry .…”