Spectroscopic characterization of mononuclear, binuclear, and insoluble polynuclear oxovanadium(IV)–Schiff base complexes and their oxidation catalysis

The synthesis and characterization of several hexa-coordinated ruthenium(III) complexes of the type [RuCl(PPh 3 ) 2 (L)] (L = dibasic tridentate ligand derived by the condensation of salicylaldehyde/ovanillin with o-aminophenol/o-aminothiophenol) are reported. IR, electronic, EPR spectral data and redox bahaviour of the complexes are discussed. An octahedral geometry has been tentatively proposed for all the complexes. The new complexes were found to be effective catalysts for the oxidation of benzyl alcohol and cyclohexanol to benzaldehyde and cyclohexanone respectively using N-methylmorpholine-N-oxide as a co-oxidant.

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“…Although monovalent Ru(I), 26 bivalent Co(II), Ni(II), Cu(II), Zn(II) and Ru(II) 27 -30 and tetravalent VO(IV) 31,32 …”

Section: Introductionmentioning

confidence: 99%

Synthetic and catalytic investigations of ruthenium(III) complexes with triphenylphosphine/triphenylarsine and tridentate Schiff base

Priyarega

Prabhakaran

Aranganayagam

et al. 2007

Applied Organom Chemis

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“…polymeric metal complexes derived from simple or polymeric coordinating ligands are generally insoluble in common solvents and have added advantage, over monomer analogues, of easy separation from the catalytic reaction mixture leading to operational flexibility and recyclability [17,18]. Recently reported oxovanadium(IV) based coordination polymers by Ando et al [19] are insoluble * Corresponding author. Tel.…”

Section: Introductionmentioning

confidence: 99%

“…Tel. : +91 1332 285327; fax: +91 1332 273560. in common solvents and their catalytic oxidation reactions are heterogeneous in nature [19].…”

Section: Introductionmentioning

confidence: 99%

Oxovanadium(IV) based coordination polymers and their catalytic potentials for the oxidation of styrene, cyclohexene and trans-stilbene

Maurya

Kumar

2006

Journal of Molecular Catalysis A: Chemical

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“…It has been reported that oxovanadium complexes with coordination number 5 have m(V=O) values at about 950-1,000 cm -1 [29]. Thus, the three vanadyl complexes should exhibit monomeric square-pyramidal geometries with no ligand in the axial position.…”

Section: Spectroscopic and Physico-chemical Studiesmentioning

confidence: 99%

Heterotrinuclear manganese(II) and vanadium(IV) Schiff base complexes as epoxidation catalysts

Mohebbi

Bahrami

Shangaie

2011

Transition Met Chem

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The catalytic epoxidation of styrene using ureahydrogen peroxide and heterotrinuclear Cu(II) complexes with general formula (ML n ) 2 Cu(acac) 2 , where n = 1-3 and M = VO 2? or Mn 2? is reported. Schiff base complexes ML n involving a 3,4-diaminopyridine bridge with free coordination site were used as the ligand, where (L n ) 2-is [(5-x-Sal) 2 Py] 2 and x = H, Br or NO 2 . The complexes were characterized by physico-chemical and spectroscopic methods. The electrochemical properties of M were modified upon trinuclear complex formation. The trinuclear complexes show high catalytic activity, with up to 86% conversion and 93% selectivity, while no catalytic properties were observed for the monomeric complexes. The catalyst could be reused with some loss of activity.

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Spectroscopic characterization of mononuclear, binuclear, and insoluble polynuclear oxovanadium(IV)–Schiff base complexes and their oxidation catalysis

Cited by 50 publications

References 28 publications

Synthetic and catalytic investigations of ruthenium(III) complexes with triphenylphosphine/triphenylarsine and tridentate Schiff base

Synthetic and catalytic investigations of ruthenium(III) complexes with triphenylphosphine/triphenylarsine and tridentate Schiff base

Oxovanadium(IV) based coordination polymers and their catalytic potentials for the oxidation of styrene, cyclohexene and trans-stilbene

Heterotrinuclear manganese(II) and vanadium(IV) Schiff base complexes as epoxidation catalysts

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