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|Title:||Oxidomolybdenum complexes for acid catalysis using alcohols as solvents and reactants|
|Author:||Gomes, Ana C.|
Valente, Anabela A.
Goncalves, Isabel S.
MOLYBDENUM(VI) DICHLORIDE DIOXIDE
|Publisher:||ROYAL SOC CHEMISTRY|
|Abstract:||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.|
|Appears in Collections:||CICECO - Artigos|
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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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