Acidities of OH compounds, including alcohols, phenol, carboxylic acids, and mineral acids

1990 ◽  
Vol 112 (6) ◽  
pp. 2047-2052 ◽  
Author(s):  
Robert W. Taft ◽  
I. A. Koppel ◽  
R. D. Topsom ◽  
F. Anvia
Keyword(s):  
Carboxylic Acids ◽  
Mineral Acids

Interactions of amino acids, carboxylic acids, and mineral acids with different quinoline derivatives

2011 ◽  
Vol 990 (1-3) ◽  
pp. 183-196 ◽  
Author(s):  
Dipjyoti Kalita ◽  
Himangshu Deka ◽  
Shyam Sundar Samanta ◽  
Subrata Guchait ◽  
Jubaraj B. Baruah
Keyword(s):  
Amino Acids ◽  
Carboxylic Acids ◽  
Quinoline Derivatives ◽  
Mineral Acids

1H NMR studies of proton transfer in Schiff base and carboxylic acid systems

1990 ◽  
Vol 68 (10) ◽  
pp. 1909-1916 ◽  
Author(s):  
Hoa Le-Thanh ◽  
D. Vocelle
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Proton Transfer ◽  
Carboxylic Acids ◽  
Proton Nuclear Magnetic Resonance ◽  
Nmr Studies ◽  
H Nmr ◽  
Mineral Acids ◽  
Rapid Equilibrium

When the unconjugated Schiff base, isobutylidene isopropylamine (2), reacts with acids such as the mineral acids HCl, HBr, and HI, or the carboxylic acids trichloroacetic, monochloroacetic, and propionic acid, in CDCl3, several complexes are formed. In this study, 1H NMR allows us to differentiate between several possibilities. With the mineral acids, only 1:1 structures are seen and the chemical shift of the [Formula: see text] proton varies according to the strength of the hydrogen bond between the protonated Schiff base and its counterion. With the carboxylic acids, 1:1 and 1:2 structures are present in rapid equilibrium. In the presence of an excess of acid, protonation of the Schiff base increases considerably. Extrapolation of the results is given in terms of the molecular mechanism of vision. Keywords: protonation, proton nuclear magnetic resonance, proton transfer, rhodopsins, Schiff base.

A convenient preparative method for 1,4-diketones from carboxylic acids

1977 ◽  
Vol 27 (1) ◽  
pp. 117-120
Author(s):  
Shoji Watanabe ◽  
Tsutomu Fujita ◽  
Kyoichi Suga ◽  
Haruhiko Abe
Keyword(s):  
Carboxylic Acids ◽  
Preparative Method

Probing The Resolution of 2-Alkoxy and 2-Aryloxy Carboxylic Acids

2006 ◽  
Author(s):  
Jason Eames ◽  
Ewan Boyd ◽  
Sameer Chavda
Keyword(s):  
Carboxylic Acids
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