Kinetic studies on the reactivity of triphenylmethyl cations adsorbed on silica, alumina, and aluminosilicateZ

Article Abstract:

The apparent rate constant of a polar reaction catalyzed by a moderately strong solid acid is strongly dependent on the nature of the carbenium (R+) precursor R-X, the acid strength of the solid, and the nucleophilicity of the olefinic educt. The catalysis of the surface-mediated reactions by a silica, an alumina, and an aluminosilicate is studied in a slurry of dichloromethane at ambient temperature.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Metal ores, not elsewhere classified, All Other Metal Ore Mining, Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Alumina, Aluminum Silicate, Silica, Adsorption, Aluminum silicates, Aluminum oxide, Silicon dioxide

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Probing surface basicity of solid acids with an aminobenzodifurandione dye as the solvatochromic probe

Article Abstract:

Solvatochromism and sorptiochromism of the dye 3-(4-amino-3-methylphenyl)-7-phenyl-benzol,2b:4,-5b'difuran-2,6-dione are studied. These studies were carried out with an extended set of solvents and various solid acids including silicas, aluminas, and alumosilicates.

Science & research, Research, Nuclear magnetic resonance spectroscopy, Spectra, Amino acids, Hydrogen-ion concentration, Structure, pH

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