Oxyfunctionalization of n-pentane and n-hexane by oxovanadium complexes supported on carbamated modified silica gel

Mishra, Gopal S.; Pombeiro, Armando J. L.

doi:10.1016/j.apcata.2006.02.041

Cited by 35 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They produce free HOO • radicals and create V(IV)-species, which are confirmed by DFT calculations [33,34]. We have also obtained an enhancement effect with PCA in the oxidation (O 2 ) of alkanes, catalyzed by supported V and Pd catalysts [24,35,36].…”

Section: Co-catalyst Effectsupporting

confidence: 65%

“…When the reaction time increases, the overall conversion also increases and reaches ca. 24 The further extension of the reaction time is unfavorable in view of the increase of by-product formation (Fig. 6).…”

Section: Reaction Time Effectsmentioning

confidence: 96%

“…Oxidation with O 2 in the presence of SiO 2 supported Co-complex provided 66% conversion of hexane to hexan-2-one, hexan-2-ol and some isomerized products (2 and 3-methylpentane, methylcyclopentane) [24]. Good catalytic oxidation of cyclohexane and n-octane with molecular O 2 , catalyzed by supported macrocyclic Co/V-complexes under mild reaction conditions was also obtained [25].…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Mishra

Kumar

2010

Reac Kinet Mech Cat

Self Cite

View full text Add to dashboard Cite

Heterobinuclear macrocyclic complexes, i.e. CuCoL 1, CuFeL 2 and CoVL 3, have been synthesized and anchored onto modified carbamate Al 2 O 3 in order to obtain new hybrid supported catalysts. The identities of the supported metal complexes were confirmed by FT-IR, SEM-EDS and AAS. TGA indicated that the catalysts were thermally stable up to 230°C. These catalysts have been tested for the functionalization of n-hexane with molecular O 2 . The best result was obtained with CuFeL 2 over Al 2 O 3 (ca. 19% overall conversion; 78% selectivity: hexan-2-one plus hexan-2-ol) and promoted conversion could be obtained with 2-pyrazinecarboxylic acid (as co-catalyst). The effects of various factors (temperature, O 2 pressure, reaction time and catalyst concentration) were also investigated in detail. The impact of both C-and O-centred radical traps was also assessed to establish a radical mechanism.

show abstract

Section: Co-catalyst Effectsupporting

confidence: 65%

Section: Reaction Time Effectsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Mishra

Kumar

2010

Reac Kinet Mech Cat

Self Cite

View full text Add to dashboard Cite

show abstract

“…So the prospect of operate with the ideal ''green'' oxidant, i.e. dioxygen for oxidative functionalization reactions of cyclohexane, constitute main aims of the current study [9,10]. A contribution towards widening the use of Pd in catalysis is also an objective of this work.…”

Section: Introductionmentioning

confidence: 97%

Oxidation of Cyclohexane with Molecular Oxygen Catalyzed by SiO2 Supported Palladium Catalysts

Mishra¹,

Sinha

2008

Catal Lett

Self Cite

View full text Add to dashboard Cite

The di(ethylthio)ethane palladium (A) and di(ethylthio)propane palladium (B) complexes have been immobilized on the surface of silica gel and these catalyst systems are shown to serve as effective supported Pd catalysts for cyclohexane oxidation with O 2 under solvent free condition. The supported catalyst A provides best results (overall ca. 16.2% conversion, with a selectivity of 72 or 24% for cyclohexanol or cyclohexanone, respectively, which are further promoted in the presence of 2-pyrazinecarboxylic acid which acts as a co-catalyst (overall ca. 21.2% conversion).

show abstract

“…Estes íons são ácidos duros e podem formar complexos com espécies ricas em oxigênio como cetonas por exemplo, dando origem a compostos muito estáveis. Alguns complexos de vanádio apresentam propriedades similares à da insulina no organismo, que podem ser utilizadas para o estudo do metabolismo da glicose in vivo [222][223][224][225][226][227][228] .…”

Section: Esponjas De Cubionunclassified

Contribuição à química das Cucurbit[n]urilas

Demets¹

View full text Add to dashboard Cite

show abstract

Oxyfunctionalization of n-pentane and n-hexane by oxovanadium complexes supported on carbamated modified silica gel

Cited by 35 publications

References 47 publications

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Oxidation of Cyclohexane with Molecular Oxygen Catalyzed by SiO2 Supported Palladium Catalysts

Contribuição à química das Cucurbit[n]urilas

Contact Info

Product

Resources

About