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Acidity Constants of Boronic Acids as Simply as Possible: Experimental, Correlations, and Prediction [PDF]

open access: yesMolecules
The wide use of boronic compounds, especially boronic acids and benzoxaboroles, in virtually all fields of chemistry is related to their specific properties. The most important of them are the ability to form cyclic esters with diols and the complexation
Andrzej Sporzyński   +5 more
doaj   +2 more sources

Spectrophotometric determination of the acidity constants of calcon in water and mixed water–organic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
The acid–base properties of calcon (1-(2-hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid) in water and mixed water–organic solvents at 25 °C at an ionic strength of 0.10 M are studied by a multiwavelength spectrophotometric method. The organic solvents
MOHAMMAD MAZLOUM-ARDAKANI   +4 more
doaj   +3 more sources

Acid-base equilibria of 2,4-diiodo-6-methylphenylcarbamoylmethyl iminodiacetic acid and its labeling with technetium-99m [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
The acid-base equilibria of a novel hepatobiliary imaging agent, 2,4-diiodo-6-methylphenylcarbamoylmethyl iminodiacetic acid (DIIODIDA) were studied.
Brborić Jasmina S.   +4 more
doaj   +3 more sources

Synthesis of some bis- and mono-2-hydroxybenzoic acid derivatives and the determination of their acidity constants [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
Several bis- and mono-2-hydroxybenzoic acid derivatives were synthesized by the reaction of methyl 2-hydroxybenzoate with some alcohols (diols, polyols and amino alcohols) and their acidity constants were determined in 60 % aqueous ethanol by the ...
KATARINA M. PENOV GASI   +4 more
doaj   +3 more sources

Acid dissociation constants of glycopeptides [PDF]

open access: yesBiochemical Journal, 1977
Glycopeptides containing mainly four amino acid residues in the sequence Asn-Leu-Thr-Ser, with small amounts of additional amino acid residues, were isolated from enzymic hydrolysates of hen's-egg albumin. Heterogeneity of the carbohydrate moiety was confirmed. Acid-base titrations showed that the alpha-amino group has a pKa value of 6.43 at 25 degrees
B M, Austen, R D, Marshall
openaire   +2 more sources

Protolytic equlibria of bromazepam [PDF]

open access: yesJournal of the Serbian Chemical Society, 2002
The protolytic equilibria of bromazepam, an ampholyte sparingly soluble in water, in homogeneous and heterogeneous systems were studied in the pH range 0–14 at 25ºC and at ionic strength of 0.1 mol/dm3 (NaCl).
Pfendt Lidija B.   +3 more
doaj   +1 more source

Uso de redes neurais recorrentes na determinação das constantes de acidez para a 7-epiclusianona em misturas etanol-água

open access: yesQuímica Nova, 2012
This work propose a recursive neural network to solve inverse equilibrium problem. The acidity constants of 7-epiclusianone in ethanol-water binary mixtures were determined from multiwavelength spectrophotmetric data.
Éderson D' Martin Costa   +3 more
doaj   +1 more source

Protolytic equilibria in homogeneous and heterogeneous systems of ketoconazole and its direct spectrophotometric determination in tablets [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
The acid-base equilibria of a diprotic, slightly hydrosoluble base ketoconazole were studied in homogeneous and heterogeneous water systems. The determinations were performed at 25 ºC at a constant ionic strength of 0.1M(NaCl).
MIRJANA P. VOJIC   +3 more
doaj   +3 more sources

An LFER study of the protolytic equilibria of 4-aryl-2,4-dioxobutanoic acids in aqueous solutions [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
The protolytic equilibria of 13 4-aryl-2,4-dioxobutanoic acids (ADKs) were spectrophotometrically studied in aqueous solutions in the pH range 1–9 at 25±1 °C and an ionic strength of 0.1 mol l-1 (NaCl), with the exception of the 4-OH- derivative which ...
TATJANA Z. VERBIC   +5 more
doaj   +3 more sources

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