ChemInform Abstract: Catalytic Activity of Trivalent Lanthanoid Salts in the Alkylation Reaction of Aromatic Hydrocarbons with Acyl Halide-Benzaldehyde Mixtures.

ChemInform ◽  
1990 ◽  
Vol 21 (49) ◽  
Author(s):  
D. V. DAVYDOV ◽  
S. A. VINOGRADOV ◽  
I. P. BELETSKAYA
Keyword(s):  
Catalytic Activity ◽  
Aromatic Hydrocarbons ◽  
Alkylation Reaction ◽  
Acyl Halide

scholarly journals Catalytic Activity of Polynuclear vs. Dinuclear Aroylhydrazone Cu(II) Complexes in Microwave-Assisted Oxidation of Neat Aliphatic and Aromatic Hydrocarbons

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 47 ◽  
Author(s):  
Manas Sutradhar ◽  
Tannistha Barman ◽  
Armando Pombeiro ◽  
Luísa Martins
Keyword(s):  
Catalytic Activity ◽  
Aromatic Hydrocarbons ◽  
Catalytic Performance ◽  
Antiproliferative Agents ◽  
One Dimensional ◽  
X Ray ◽  
X Ray Crystallography ◽  
Mild Conditions ◽  
Microwave Assisted ◽  
Aliphatic And Aromatic Hydrocarbons

One-dimensional (1D) polynuclear Cu(II) complex (1) derived from (5-bromo-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L) is synthesized and characterized by elemental analysis, IR spectroscopy, ESI-MS, and single crystal X-ray crystallography. Its catalytic performance towards the solvent-free microwave-assisted peroxidative oxidation of aliphatic and aromatic hydrocarbons under mild conditions is compared with that of dinuclear Cu(II) complexes (2 and 3) of the same ligand, previously reported as antiproliferative agents. Polymer 1 exhibits the highest activity, either for the oxidation of cyclohexane (leading to overall yields, based on the alkane, of up to 39% of cyclohexanol and cyclohexanone) or towards the oxidation of toluene (selectively affording benzaldehyde up to a 44% yield), after 2 or 2.5 h of irradiation at 80 or 50 °C, respectively.

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 382-388 ◽  
Author(s):  
Jack M Miller ◽  
David Wails ◽  
J Stephen Hartman ◽  
Karla Schebesh ◽  
Jennifer L Belelie
Keyword(s):  
Catalytic Activity ◽  
Pore Size ◽  
Zinc Chloride ◽  
Sol Gel ◽  
Nitrogen Adsorption ◽  
Potassium Fluoride ◽  
Physical Structure ◽  
Alkylation Reaction ◽  
Size Distributions ◽  
Pore Size Distributions

Novel mesoporous silicas have been prepared via a sol-gel route involving fluoride-catalyzed hydrolysis of tetraethylorthosilicate (TEOS). Incorporation of zinc chloride by sol-gel synthesis gives a range of mesoporous materials with significantly higher catalytic activity than the commercially available catalyst, Clayzic, in a model Friedel-Crafts alkylation reaction. The dependence of catalytic activity and physical structure on the amounts of solvent, water, zinc chloride, and potassium fluoride used in the preparation are explored, and the materials have been further characterized by nitrogen adsorption to determine surface areas, total pore volumes, and pore-size distributions and by 29Si and 19F MAS NMR spectroscopy. The most active catalysts generally have the highest total pore volumes, with pore-size distributions larger than 8 nm.Key words: sol-gel, Friedel-Crafts, Clayzic, silica.

Structure and Reactivity of Aromatic Polymers/Ruthenium Catalysts

1985 ◽  
Vol 40 (2) ◽  
pp. 133-140 ◽  
Author(s):  
Francesco Ciardelli ◽  
Paolo Pertici
Keyword(s):  
Raman Spectroscopy ◽  
Catalytic Activity ◽  
Aromatic Hydrocarbons ◽  
Metal Clusters ◽  
Nitroaromatic Compounds ◽  
Ruthenium Catalysts ◽  
General Validity ◽  
Similar Product ◽  
Ruthenium Arene ◽  
Ir And Raman

Previously prepared (J. Mol. Catalysis 11, 353 (1981)) polystyrene/ruthenium systems have been examined by EXAFS, TEM, IR and Raman spectroscopy. A structure based on small metal clusters bound to the polymer by single ruthenium-arene binding is proposed. The general validity of the approach has been confirmed by preparing a similar product when starting with poly-1- vinylnaphthalene in the place of polystyrene.Both systems are active for the hydrogenation of a large variety of unsaturated groups such as olefinic double bonds, mononuclear aromatic hydrocarbons, ketones, nitriles, nitroaromatic compounds and oximes. Catalytic activity, chemio- and stereoselectivity are discussed in terms of the proposed structure.

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