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http://hdl.handle.net/10773/20963
Título: | Oxidomolybdenum complexes for acid catalysis using alcohols as solvents and reactants |
Autor: | Gomes, Ana C. Neves, Patricia Cunha-Silva, Luis Valente, Anabela A. Goncalves, Isabel S. Pillinger, Martyn |
Palavras-chave: | LEWIS-BASE ADDUCTS RING-OPENING REACTIONS MOLYBDENUM(VI) DICHLORIDE DIOXIDE VALENT OXO-MOLYBDENUM OLEFIN EPOXIDATION DIOXOMOLYBDENUM(VI) COMPLEXES THIOCYANATODIOXOMOLYBDENUM(VI) COMPLEXES STRUCTURAL-CHARACTERIZATION CYCLOOCTENE EPOXIDATION EFFICIENT CATALYSTS |
Data: | 2016 |
Editora: | ROYAL SOC CHEMISTRY |
Resumo: | The application field of dichloridodioxidomolybdenum (VI) chelate complexes, which have been intensively investigated as catalysts for liquid-phase olefin epoxidation, is broadened to encompass acid catalysis, in particular, alcoholysis and acetalisation reactions. Complex [MoO2Cl2(L)] (1) with L = 4,4'-di-tert-butyl-2,2'-bipyridine was chosen as (pre)catalyst. Depending on the reaction conditions, 1 either remained structurally intact or was transformed into different metal species, the structures of which were determined on the basis of single-crystal X-ray diffraction, spectroscopic techniques (FT-IR and H-1 NMR), and elemental analysis. The first example of a mixed-ligand complex of the type [MoO2X(OR)(L)] (X = halide) is disclosed. This complex is one of only a handful of complexes known to date that exhibit an all-cis configuration instead of the usual cis-oxido, trans-X, cis-L configuration (X = anionic ligand). Mechanistic considerations of the formation of the metal species are made. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20963 |
DOI: | 10.1039/c5cy02052b |
ISSN: | 2044-4753 |
Versão do Editor: | 10.1039/c5cy02052b |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Oxidomolybdenum complexes for acid catalysis using alcohols as solvents and reactants_10.1039c5cy02052b.pdf | 1.39 MB | Adobe PDF |
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