The Hydrolysis of Sodium Acetate.

Farrer, Humphrey N.; Rossotti, F. J. C.; Johansson, Lars; Norén, Bertil; Munch‐Petersen, Jon

doi:10.3891/acta.chem.scand.17-1824

Cited by 16 publications

(6 citation statements)

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“…Py and LiCl as hydrogen-bond acceptors might not completely destroy the associations of TPA, as suggested by the formation of an acetic acid dimer and homoconjugated anions even in aqueous sodium acetate. 9 To investigate how LiCl should be involved in the reaction, we examined the polycondensation of dicarboxylic acids with 2,2-bis(4-hydroxylphenyl)propane (BPA) or 2,2-bis(4-hydroxy-3-methylphenyl)propane (DM-BPA) by changing the order of its addition (Table 1). When TPA was activated in the presence of LiCl (path B), the reaction of (TPA*) n with DM-BPA yielded a significantly better result than that obtained by its addition to the reaction mixtures containing (TPA*) mЈ (path A).…”

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confidence: 99%

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Polyesterification of aromatic dicarboxylic acids and bisphenols with tosyl chloride/dimethylformamide/pyridine promoted by the improvement of the difficult solubility of the activated diacids with lithium chloride

Higashi

Kira

2004

J. Polym. Sci. A Polym. Chem.

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The solution polyesterification of dicarboxylic acids in pyridine, the activated intermediates of which were difficult to dissolve in tosyl chloride/dimethylformamide/pyridine, was investigated in the presence of lithium chloride. The solubility of the activated dicarboxylic acids was largely improved by the presence of the salt, and the polycondensation with bisphenols was greatly facilitated. The salt was more effectively added to a pyridine solution of dicarboxylic acids than to the activated dicarboxylic acids in pyridine. The favorable additive effect on the improved solubility was attributed to a lowered degree of association of the activated dicarboxylic acids, which led to distributions of the resulting oligomers from bisphenols at an earlier stage closer to the theoretical ones and yielded better polycondensation results. The reaction, which proceeded through favorable distributions of the co-oligomers, produced copolymers of higher inherent viscosities and slightly block sequence distributions determined by NMR.

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Section: Resultsmentioning

confidence: 99%

“…The salt formation was detected by precipitation from a mixture of TPA and LiCl in Py. Py and LiCl as hydrogen‐bond acceptors might not completely destroy the associations of TPA, as suggested by the formation of an acetic acid dimer and homoconjugated anions even in aqueous sodium acetate 9…”

Section: Resultsmentioning

confidence: 99%

Polyesterification of aromatic dicarboxylic acids and bisphenols with tosyl chloride/dimethylformamide/pyridine promoted by the improvement of the difficult solubility of the activated diacids with lithium chloride

Higashi

Kira

2004

J. Polym. Sci. A Polym. Chem.

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“…EXPERIMENTAL Equipment. The general construction of the balance has been described (2,4). Briefly, the isopiestic balance consists of a quartz tube contained in a furnace and suspended by a balance system.…”

Section: Resultsmentioning

confidence: 99%

“…Although ACTIVITY COEFFICIENTS have been obtained for the Ci to C4 carboxylic acids in aqueous solution (6) and for the aqueous Ci to Ca sodium carboxylates (10), only a few results are available for aqueous mixtures of carboxylic acids and their corresponding carboxylate salts (2,8). The present study provides activity coefficients at 25°C.…”

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confidence: 95%

Activity coefficients in aqueous carboxylic acid-sodium carboxylate solutions

Czeisler¹,

Schrier²

1969

J. Chem. Eng. Data

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“…Later on there has been some controversy regarding the reality of acid-acid association [4,5]. The argument was that medium effects might have been overlooked; in terms of the treatment given previously by one of the present authors [3] this difficulty arose because it was not clear whether the observed effect is to be counted as a structural effect or as a background effect.…”

Section: Introductionmentioning

confidence: 81%

Model Orientation Dependent Pair Distribution Functions Describing the Association of Simple Carboxylic Acids and of Ethanol in Aqueous Solution

Hertz

Tutsch

1976

Ber Bunsenges Phys Chem

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Nuclear magnetic relaxation rates of the CH proton of formic acid and of the methyl and methylen protons of acetic, propionic, and butyric acid and of ethanol are reported. All these substances are dissolved in water (D2O) and the organic molecules are such that the hydrogen nuclei whose relaxation is not studied are deuterons. The corresponding deuteron relaxation rates (in H2O) have also been measured and the results are converted to yield the proton intramolecular relaxation rates and the intermolecular relaxation rates. Lastly, intermolecular proton relaxation rates which are caused by the interaction with protons in other groups have been measured. All these data are given as a function of the acid mole fraction x2. From these experimental results first coordination numbers of the acids with respect to the acid and closest distances of approach between the various hydrocarbon groups have been derived. Model molecular pair distribution functions have been constructed which show that propionic acid and butyric acid molecules undergo a change in the relative pair configuration as more and more water is added such that a side by side configuration of the hydrocarbon rests is produced. In the ethanol water mixture the structural change is the reverse one and here no hydrophobic association is observable.

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The Hydrolysis of Sodium Acetate.

Cited by 16 publications

References 0 publications

Polyesterification of aromatic dicarboxylic acids and bisphenols with tosyl chloride/dimethylformamide/pyridine promoted by the improvement of the difficult solubility of the activated diacids with lithium chloride

Polyesterification of aromatic dicarboxylic acids and bisphenols with tosyl chloride/dimethylformamide/pyridine promoted by the improvement of the difficult solubility of the activated diacids with lithium chloride

Activity coefficients in aqueous carboxylic acid-sodium carboxylate solutions

Model Orientation Dependent Pair Distribution Functions Describing the Association of Simple Carboxylic Acids and of Ethanol in Aqueous Solution

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