Synthesis of two new Mo(II) organometallic catalysts immobilized on POSS for application in olefin oxidation reactions

Author(s)

Vieira, Eduardo Guimaraes ; Dal-Bo, Alexandre Goncalves ; Allievi Frizon, Tiago Elias ; Dias Filho, Newton Luiz

• Document type: Journal article
• Source: JOURNAL OF ORGANOMETALLIC CHEMISTRY; v. 834, p. 73-82, APR 15 2017.
• Web of Science Citations: 2

Abstract

The purpose of this work was the preparation and characterization of two new catalysts POSS-ATZAc-{[}Mo(eta(3)-C3H5)Br(CO)(2)] (POSS-Mo-I) and POSS-ATZAc-{[}Mo(CO)(3)Br-2] (POSS-Mo-II). The new heterogeneous catalysts were characterized by several techniques and used as catalysts for the epoxidation of olefins, presenting high catalytic activity. To study and optimize the syntheses of the heterogeneous catalysts, immobilization experiments of the {[}Mo(eta(3)-C3H5)Br(CO)(2)(NCMe)(2)] and {[}Mo(CO) Br-3(2)(NCMe)(2)] organometallic complexes on the modified polyhedral oligomeric silsesquioxane were performed. The sorption properties of the modified silsesquioxane showed to be dependent of the contact time, concentration and temperature. Catalysts were tested in the epoxidation of six olefins and compared with homogeneous species {[}Mo(eta(3)-C3H5) Br(CO)(2)(ATZAc)] (Mo-I) and {[}Mo(CO)(3)Br-2(ATZAc)] (Mo-II). To the best of our knowledge, this paper is the first that has reported the preparation and characterization of two new heterogeneous catalysts, as well as the comparison with homogeneous species for catalytic epoxidation of olefins. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 14/05566-5 - Study of the reactions of immobilization of tungsten and molybdenum organometallic complexes on the polyhedral oligomeric silsesquioxanes for application in catalysis
• Grantee: Eduardo Guimarães Vieira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/24602-0 - Synthesis and characterization of polyhedral oligomeric silsesquioxanes and their applications in process of adsorption and catalysis
• Grantee: Newton Luiz Dias Filho
• Support Opportunities: Regular Research Grants