Organic nitroxyls such as 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) are stable in solution and widely used as catalysts and mediators in chemical and electrochemical redox reactions, such as alcohol oxidation. The three most common species involved in these reactions are illustrated in the figure below. Hydroxylam- monium (RNOH, not shown), the conjugate acid of hydroxylamine (RNOH), is the 4th species involved. OH 2,6,6-tetramethylpiperidine-N-oxyl (TEMPO, noted RNO) Data:: pKa (RNOH/RNOH) = 7.34; E° (RNO+/RNO) = 0.74/SHE ; E (RNO/RNOH) = 0.64 V/SHE The following incomplete diagram¹ is plotted for the 4 species above, all at a concentration of 0.01 mol.L-¹. Hydroxylamine (RNOH) I Oxoammonium (RNO*)

Organic nitroxyls such as 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) are stable in solution and widely used as catalysts and mediators in chemical and electrochemical redox reactions, such as alcohol oxidation. The three most common species involved in these reactions are illustrated in the figure below. Hydroxylam- monium (RNOH, not shown), the conjugate acid of hydroxylamine (RNOH), is the 4th species involved. OH 2,6,6-tetramethylpiperidine-N-oxyl (TEMPO, noted RNO) Data:: pKa (RNOH/RNOH) = 7.34; E° (RNO+/RNO) = 0.74/SHE ; E (RNO/RNOH) = 0.64 V/SHE The following incomplete diagram¹ is plotted for the 4 species above, all at a concentration of 0.01 mol.L-¹. Hydroxylamine (RNOH) I Oxoammonium (RNO*)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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