565. Acid–base catalysis in non-aqueous solvents. Part XIII. The depolymerisation of paraldehyde in ethereal solutions of proton acids and Lewis acids

R. P. Bell; B. G. Skinner

doi:10.1039/jr9520002955

565. Acid–base catalysis in non-aqueous solvents. Part XIII. The depolymerisation of paraldehyde in ethereal solutions of proton acids and Lewis acids

Journal of the Chemical Society (Resumed) ◽

10.1039/jr9520002955 ◽

1952 ◽

Vol 0 (0) ◽

pp. 2955-2959 ◽

Cited By ~ 6

Author(s):

R. P. Bell ◽

B. G. Skinner

Keyword(s):

Lewis Acids ◽

Base Catalysis ◽

Acid Base

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Faculty Opinions recommendation of General acid-base catalysis mediated by nucleobases in the hairpin ribozyme.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.717959557.793462815 ◽

2012 ◽

Author(s):

Robert Batey

Keyword(s):

Base Catalysis ◽

Hairpin Ribozyme ◽

Acid Base ◽

General Acid

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Mechanism of hydration and isomerisation of 4-ethylidene-2,6-di-tert-butyl-2,5-cyclohexadien-1-one. Kinetics, acid-base catalysis and solvent deuterium isotope effects

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19790110 ◽

1979 ◽

Vol 44 (1) ◽

pp. 110-122 ◽

Cited By ~ 2

Author(s):

Jiří Velek ◽

Bohumír Koutek ◽

Milan Souček

Keyword(s):

Aqueous Medium ◽

Rate Equation ◽

Kinetic Data ◽

Isotope Effects ◽

Base Catalysis ◽

Quinone Methide ◽

Reaction Products ◽

Acid Base ◽

Deuterium Isotope Effects ◽

Hydroxybenzyl Alcohol

Competitive hydration and isomerisation of the quinone methide I at 25 °C in an aqueous medium in the region of pH 2.4-13.0 was studied spectrophotometrically. The only reaction products in the studied range of pH are 4-hydroxybenzyl alcohol (II) and 4-hydroxystyrene (III). The form of the overall rate equation corresponds to a general acid-base catalysis. The mechanism of both reactions for three markedly separated pH regions is discussed on the basis of kinetic data and solvent deuterium effect.

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Pulse polarographic study of the behaviour of some o,o'-dihydroxyazo-compounds

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19891219 ◽

1989 ◽

Vol 54 (5) ◽

pp. 1219-1226 ◽

Cited By ~ 3

Author(s):

Enric Casassas ◽

Miquel Esteban ◽

Santiago Alier

Keyword(s):

Carboxylic Acid ◽

Reaction Mechanisms ◽

Sulphonic Acid ◽

Base Catalysis ◽

Polarographic Study ◽

Acid Base ◽

Eriochrome Black T ◽

Naphthoic Acid ◽

Calcon Carboxylic Acid

The reduction of several o,o'-dihydroxyazo-compounds is studied by means of pulse polarographic techniques (DPP, NPP and RPP). The compounds studied are the following: 2-(2'-hydroxyphenylazo)-phenol (o,o'-dihydroxyazobenzene), 1-(2'-hydroxy-1'-naphthylazo)-2-naphthol-4-sulphonic acid (calcon or Eriochrome Blue Black R), 1-(2'-hydroxy-4'-sulpho-1'-naphthylazo)-2-hydroxy-3-naphthoic acid (calcon carboxylic acid), and 1-(1'-hydroxy-2'-naphthylazo)-6-nitro-2-naphthol-4-sulphonic acid (Eriochrome Black T). Correlations between Ip and Epand experimental variables (pH, T, conc.) and instrumental parameters (dropping time, t, and pulse magnitude, ΔE) are established. Reaction mechanisms formerly proposed are discussed on the basis of the new obtained results, and the ranges are defined where adsorption and/or acid-base catalysis are operative.

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