Conklin, Martha H. and Hoffmann, Michael R. (1988) Metal ion-sulfur(IV) chemistry. 3. Thermodynamics and kinetics of transient iron(III)-sulfur(IV) complexes. Environmental Science and Technology, 22 (8). pp. 899-907. ISSN 0013-936X. http://resolver.caltech.edu/CaltechAUTHORS:20150814-140636362
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Abstract
Stability constants for the formation of Fe(III)-S(IV) complexes at µ = 0.4 M were determined spectroscopically. Values of K_1 = 10^(6.6) M^(-1) for Fe^(3+) + SO_3^(2-) ⇌ FeSO_3^+ and K_4 = 10^(7.3) M^(-1) for FeOH^(2+) + SO_3^(2-) ⇌ HOFeSO_3 were obtained. Raman measurements indicate that sulfite binds to the metal through oxygen. The kinetics of electron transfer between Fe(III) and S(IV) have been studied, and a mechanism is proposed. Kinetic and mechanistic aspects of the Fe(III)-catalyzed autoxidation of S(IV) are discussed in light of these results.
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| Additional Information: | © 1988 American Chemical Society. Received for review May 1, 1987. Accepted January 6, 1988. We are indebted to Eric C. Betterton (Caltech) for his expert assistance throughout the latter stages of this work. We also acknowledge the personal support of our program officers D. Alan. Hanson (EPRI) and L. Swaby (EPA). | |||||||||
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| Record Number: | CaltechAUTHORS:20150814-140636362 | |||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20150814-140636362 | |||||||||
| Official Citation: | Metal ion-sulfur(IV) chemistry. 3. Thermodynamics and kinetics of transient iron(III)-sulfur(IV) complexes Martha H. Conklin and Michael R. Hoffmann Environmental Science & Technology 1988 22 (8), 899-907 DOI: 10.1021/es00173a006 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 59551 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 17 Aug 2015 17:34 | |||||||||
| Last Modified: | 17 Aug 2015 17:34 |
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