E-Mail Alert

Add your e-mail address to receive forthcoming issues of this journal:

Journal Browser

Journal Browser

Special Issue "Molybdenum-Catalyzed Oxidation Reactions"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organometallic Chemistry".

Deadline for manuscript submissions: 2 November 2018

Special Issue Editors

Guest Editor
Prof. Agustín Galindo del Pozo

Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Aptdo 1203, 41071 Sevilla, Spain
Website | E-Mail
Interests: Coordination chemistry; Homogeneous catalysis; Green solvents; Oxidation reactions; Molybdenum; Vanadium; Copper; DFT.
Guest Editor
Prof. Francisco J. Montilla Ramos

Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Aptdo 1203, 41071 Sevilla, Spain.
Website | E-Mail
Interests: Coordination chemistry; Homogeneous catalysis; Green solvents; Oxidation reactions; Molybdenum; Vanadium; Copper; DFT.

Special Issue Information

Dear Colleagues,

Homogeneous metal-catalyzed oxidation reactions play an important role in chemistry, and, over the last few decades, there has been an increasing demand for chemoselective, mild, and green processes. This fact has produced remarkable developments in the field and now a large number of metal complexes (based, amongst others, on rhenium, manganese, copper, vanadium, iron, etc., metals) are able to catalyze oxidation reactions of a broad spectrum of organic substrates. The substitution of classic stoichiometric oxidants for catalytic reactions employing more environmentally friendly oxidants (air, molecular oxygen, hydrogen peroxide, etc.) is now a requirement of modern oxidation chemistry. The choice of greener reactants is imposed for sustainable, economic and environmental strategies and thus the selected green oxidant should be compatible with the catalyst. In general, molybdenum complexes fulfill this requirement and their facile preparation, stability and low cost would make them attractive alternatives to less accessible complexes of rarer metals. This Special Issue will compile novel results on the use of molybdenum complexes as catalysts in oxidation reactions (epoxidation, sulfoxidation and others).

Prof. Agustín Galindo del Pozo
Prof. Francisco J. Montilla Ramos
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Molybdenum
  • Homogeneous Catalysis
  • Oxidation
  • Epoxidation
  • Sulfoxidation
  • Green oxidants
  • Green Solvents

Published Papers (1 paper)

View options order results:
result details:
Displaying articles 1-1
Export citation of selected articles as:

Research

Open AccessFeature PaperArticle Molybdenum-Catalyzed Enantioselective Sulfoxidation Controlled by a Nonclassical Hydrogen Bond between Coordinated Chiral Imidazolium-Based Dicarboxylate and Peroxido Ligands
Molecules 2018, 23(7), 1595; https://doi.org/10.3390/molecules23071595
Received: 22 May 2018 / Revised: 25 June 2018 / Accepted: 28 June 2018 / Published: 30 June 2018
PDF Full-text (1803 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities. The asymmetry is generated by the use of imidazolium-based dicarboxylic compounds, HLR. The in-situ-generated
[...] Read more.
Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities. The asymmetry is generated by the use of imidazolium-based dicarboxylic compounds, HLR. The in-situ-generated catalyst, a mixture of aqueous [Mo(O)(O2)2(H2O)n] with HLR as chirality inductors, in the presence of [PPh4]Br, was identified as the anionic binuclear complex [PPh4]{[Mo(O)(O2)2(H2O)]2(μ-LR)}, according to spectroscopic data and Density Functional Theory (DFT) calculations. A nonclassical hydrogen bond between one C–H bond of the alkyl R group of coordinated (LR) and one oxygen atom of the peroxido ligand was identified as the interaction responsible for the asymmetry in the process. Additionally, the step that governs the enantioselectivity was theoretically analyzed by locating the transition states of the oxido-transfer to PhMeS of model complexes [Mo(O)(O2)2(H2O)(κ1-O-LR)] (R = H, iPr). The ∆∆G is ca. 0 kcal∙mol−1 for R = H, racemic sulfoxide, meanwhile for chiral species the ∆∆G of ca. 2 kcal∙mol−1 favors the formation of (R)-sulfoxide. Full article
(This article belongs to the Special Issue Molybdenum-Catalyzed Oxidation Reactions)
Figures

Graphical abstract

Back to Top