On the skeletons of ion exchangers. XVIII. The behaviour of polystyrene in the preparation of macroporous styrene-divinylbenzene structures

Exner, J.; Bohdanecký, M.

doi:10.1135/cccc19663985

Cited by 7 publications

(3 citation statements)

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“…For ortho-substituted compounds, it is necessary to account for the possibility of steric effects and Charton 23 therefore, modified the LDR equation to generate the LDRS equation (18). log k2 = Ll + Dd + Re + S + h (18) where  is the known Charton's steric parameter based on Van der Waals radii 24 .…”

Section: Aryl Methyl Sulfidesmentioning

confidence: 99%

“…log k2 = Ll + Dd + Re + S + h (18) where  is the known Charton's steric parameter based on Van der Waals radii 24 .…”

Section: Aryl Methyl Sulfidesmentioning

confidence: 99%

“…(7-10). We have used the standard deviation (sd), the coefficient of multiple determination (R 2 ), and Exner's 18 parameter, , as the measures of goodness of fit. Here n is the number of data points.…”

Section: Solvent Effectmentioning

confidence: 99%

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Oxidation of Organic Sulfides by Quinolinium Chlorochromate: A Kinetic and Mechanistic Approach

Sharma¹,

Rathi²,

Sharma³

et al. 2017

ECB

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The oxidation of organic sulfides by quinolinium chlorochromate (QCC) resulted the formation of the corresponding organic sulfoxides. These reactions are first order ones with respect to QCC. A Michaelis-Menten type kinetics was observed with respect to the reactants. The reaction is catalyzed by p-toluene sulfonic acid (TsOH). The oxidation was studied in nineteen different organic solvents. An analysis of the solvent effect on Swain's equation showed that the both cation-and anion-solvating powers of the solvents play important roles. The correlation analyses of the rate of oxidation of thirty-four sulfides were done in terms of various single and multiparametric equations. In the reactions of aryl methyl sulfides, the best correlation could be obtained with Charton's LDR and LDRS equations. The oxidation reactions of alkyl phenyl sulfides exhibited an excellent correlation in terms of Pavelich-Taft equation. The negative values of polar reaction constants indicate an electron-deficient sulfur center in the rate-determining step. The proposed reaction mechanism involves the formation of a sulphenium cation intermediate in a slow step * Corresponding AuthorsPhone: +91 94144-10900 E-Mail: drpkvs27@yahoo.com [a]

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Section: Aryl Methyl Sulfidesmentioning

confidence: 99%

“…log k2 = Ll + Dd + Re + S + h (18) where  is the known Charton's steric parameter based on Van der Waals radii 24 .…”

Section: Aryl Methyl Sulfidesmentioning

confidence: 99%

See 1 more Smart Citation

Oxidation of Organic Sulfides by Quinolinium Chlorochromate: A Kinetic and Mechanistic Approach

Sharma¹,

Rathi²,

Sharma³

et al. 2017

ECB

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Fractionation of Polymers

Barrales‐Rienda

Bello

et al. 1999

The Wiley Database of Polymer Properties

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Characterization of pores and gel phase in macroporous ion‐exchange resins by means of NMR spectra

Tao

Doskočilová

Štamberg

1975

Angew. Makromol. Chem.

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In the NMR spectra of some types of swollen macroporous cation-exchange resins the NMR signals of the swelling liquid in the pores and in the gel phase have been resolved. From the intensities of these signals the relative volume of pores in the swollen resin was determined. The chemical shifts of the signals of the liquid in the gel and in the pores were used for the determination of the internal molality and crosslink density in the gel phase, as well as for the characterization of the quality of the pores. ZUSAMMENFASSUNG:In den Kernresonanzspektren von einigen gequollenen makroporosen Kationenaustauschern ist es gelungen, die Signale des Quellungsmittels in den Poren und in der Gelphase aufzulosen. Aus den Signalintensitaten wurde das relative Volumen der Poren im gequollenen Harz bestimmt. Aus den chemischen Verschiebungen der Signale des Quellungsmittels im Gel und in den Poren wurde die innere Molalitat und der Vernetzungsgrad der Gelphase bestimmt und die Natur der Poren charakterisiert.

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On the skeletons of ion exchangers. XVIII. The behaviour of polystyrene in the preparation of macroporous styrene-divinylbenzene structures

Cited by 7 publications

References 0 publications

Oxidation of Organic Sulfides by Quinolinium Chlorochromate: A Kinetic and Mechanistic Approach

Oxidation of Organic Sulfides by Quinolinium Chlorochromate: A Kinetic and Mechanistic Approach

Fractionation of Polymers

Characterization of pores and gel phase in macroporous ion‐exchange resins by means of NMR spectra

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