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Volume 13, Issue 2
  • ISSN: 2211-5447
  • E-ISSN: 2211-5455

Abstract

Introduction

A four-coordinate ruthenium(II) quinoxaline Schiff base complex with formula [RuLCl].HO has been synthesized and characterized. The hydrogenation of benzene and toluene using this complex as a catalyst was studied in a semi-batch reactor.

Methods

At 60℃ with 2.82 × 10-6 mol catalyst and 30 bar hydrogen pressure, turnover frequencies 7362 h-1 and 5873 h-1 have been found for the reduction of benzene (0.34 mol) and toluene (0.28 mol), respectively.

Results

Both partial and complete reduction occurs with more selectivity for the formation of completely reduced products. The initial rate approach was used to study the kinetics of benzene hydrogenation, and the reaction was discovered to be first order with regard to benzene and the catalyst, while following Michaelis-Menton kinetics with respect to dihydrogen.

Conclusion

This kinetic data proposed an intermediate hydride/dihydrogen complex as the catalytically active species which controls the overall hydrogenation rate.

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2025-04-09

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/content/journals/ccat/10.2174/0122115447353193241119093602
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Hydrogenation of Benzene and Toluene by a Ruthenium(II) Quinoxaline Schiff Base Complex as Catalyst
Current Catalysis 13, 146 (2024); https://doi.org/10.2174/0122115447353193241119093602
/content/journals/ccat/10.2174/0122115447353193241119093602
/content/journals/ccat/10.2174/0122115447353193241119093602
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  • Article Type:     Research Article
Keyword(s): benzene; Catalytic hydrogenation; hydride/dihydrogen; quinoxaline Schiff base complexes; ruthenium(II) complex; toluene

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