Electrochemical and Catalytic Properties of oxo-ruthenate(VI) in Aqueous Alkaline Medium

Abdel Ghany F. Shoair; Mai M.A.H. Shanab; Mohamed H.H. Mahmoud

doi:10.20964/2021.05.44

Electrochemical and Catalytic Properties of oxo-ruthenate(VI) in Aqueous Alkaline Medium

Abdel Ghany F. Shoair, Mai M.A.H. Shanab, Mohamed H.H. Mahmoud

Chemistry

Taif University

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The complex K₂[Ru^(III)Cl₅(H₂O)] has been prepared and characterized by different spectroscopic techniques (IR and UV-VIS). The electrochemical properties of this complex were investigated at different pH's using Robinson buffer solutions. The cyclic voltammograms exhibited three redox different oxidation and potential peaks due to generation of Ru(III), Ru(IV), Ru(V) and Ru(VI) ions. The catalytic activity of K₂[Ru(III)Cl₅(H₂O)] towards the hydration of some aromatic and three heterocyclic nitriles to their corresponding amides was investigated with excess of three co-oxidants K2S2O8, NaOCl and KBrO₃. A number of factors have been investigated and the best yields were obtained with K₂S₂O₈ as a co-oxidant in a 1.0 M KOH at 80 °C. Both spectroscopic and electrochemical techniques were used to establish the nature of active species in this catalytic reaction and the active catalyst was found to be K₂[Ru^(VI)O₃(OH)₂], as well as to explain the possible reaction mechanism. The suggested mechanism included the coordination of nitrile to ruthenium center followed by liberation of the corresponding amide and the active complex again.

Original language	English
Article number	210545
Pages (from-to)	1-15
Number of pages	15
Journal	International Journal of Electrochemical Science
Volume	16
DOIs	https://doi.org/10.20964/2021.05.44
State	Published - 2021

Keywords

catalytic hydration
co-oxidant
ruthenium

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title = "Electrochemical and Catalytic Properties of oxo-ruthenate(VI) in Aqueous Alkaline Medium",

abstract = "The complex K2[Ru(III)Cl5(H2O)] has been prepared and characterized by different spectroscopic techniques (IR and UV-VIS). The electrochemical properties of this complex were investigated at different pH's using Robinson buffer solutions. The cyclic voltammograms exhibited three redox different oxidation and potential peaks due to generation of Ru(III), Ru(IV), Ru(V) and Ru(VI) ions. The catalytic activity of K2[Ru(III)Cl5(H2O)] towards the hydration of some aromatic and three heterocyclic nitriles to their corresponding amides was investigated with excess of three co-oxidants K2S2O8, NaOCl and KBrO3. A number of factors have been investigated and the best yields were obtained with K2S2O8 as a co-oxidant in a 1.0 M KOH at 80 °C. Both spectroscopic and electrochemical techniques were used to establish the nature of active species in this catalytic reaction and the active catalyst was found to be K2[Ru(VI)O3(OH)2], as well as to explain the possible reaction mechanism. The suggested mechanism included the coordination of nitrile to ruthenium center followed by liberation of the corresponding amide and the active complex again.",

keywords = "catalytic hydration, co-oxidant, ruthenium",

author = "Shoair, \{Abdel Ghany F.\} and Shanab, \{Mai M.A.H.\} and Mahmoud, \{Mohamed H.H.\}",

note = "Publisher Copyright: {\textcopyright} 2021 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).",

year = "2021",

doi = "10.20964/2021.05.44",

language = "English",

volume = "16",

pages = "1--15",

journal = "International Journal of Electrochemical Science",

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T1 - Electrochemical and Catalytic Properties of oxo-ruthenate(VI) in Aqueous Alkaline Medium

AU - Shoair, Abdel Ghany F.

AU - Shanab, Mai M.A.H.

AU - Mahmoud, Mohamed H.H.

N1 - Publisher Copyright: © 2021 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

PY - 2021

Y1 - 2021

N2 - The complex K2[Ru(III)Cl5(H2O)] has been prepared and characterized by different spectroscopic techniques (IR and UV-VIS). The electrochemical properties of this complex were investigated at different pH's using Robinson buffer solutions. The cyclic voltammograms exhibited three redox different oxidation and potential peaks due to generation of Ru(III), Ru(IV), Ru(V) and Ru(VI) ions. The catalytic activity of K2[Ru(III)Cl5(H2O)] towards the hydration of some aromatic and three heterocyclic nitriles to their corresponding amides was investigated with excess of three co-oxidants K2S2O8, NaOCl and KBrO3. A number of factors have been investigated and the best yields were obtained with K2S2O8 as a co-oxidant in a 1.0 M KOH at 80 °C. Both spectroscopic and electrochemical techniques were used to establish the nature of active species in this catalytic reaction and the active catalyst was found to be K2[Ru(VI)O3(OH)2], as well as to explain the possible reaction mechanism. The suggested mechanism included the coordination of nitrile to ruthenium center followed by liberation of the corresponding amide and the active complex again.

AB - The complex K2[Ru(III)Cl5(H2O)] has been prepared and characterized by different spectroscopic techniques (IR and UV-VIS). The electrochemical properties of this complex were investigated at different pH's using Robinson buffer solutions. The cyclic voltammograms exhibited three redox different oxidation and potential peaks due to generation of Ru(III), Ru(IV), Ru(V) and Ru(VI) ions. The catalytic activity of K2[Ru(III)Cl5(H2O)] towards the hydration of some aromatic and three heterocyclic nitriles to their corresponding amides was investigated with excess of three co-oxidants K2S2O8, NaOCl and KBrO3. A number of factors have been investigated and the best yields were obtained with K2S2O8 as a co-oxidant in a 1.0 M KOH at 80 °C. Both spectroscopic and electrochemical techniques were used to establish the nature of active species in this catalytic reaction and the active catalyst was found to be K2[Ru(VI)O3(OH)2], as well as to explain the possible reaction mechanism. The suggested mechanism included the coordination of nitrile to ruthenium center followed by liberation of the corresponding amide and the active complex again.

KW - catalytic hydration

KW - co-oxidant

KW - ruthenium

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JF - International Journal of Electrochemical Science

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Electrochemical and Catalytic Properties of oxo-ruthenate(VI) in Aqueous Alkaline Medium

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Keywords

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