Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 760, Issue -, Pages 212-223Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2013.10.019
Keywords
Copper; Reduced Schiff base; Salan; Oxidation catalysts; Sulfoxidation; Asymmetric catalysis
Categories
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) [PEst-OE/QUI/UI0100/2013]
- Portuguese NMR Network [REM2013, RECI/QEQ-QIN/0189/2012, RECI/QEQ-MED/0330/2012]
- Portuguese Mass Spectrometry Network [REM2013, RECI/QEQ-QIN/0189/2012, RECI/QEQ-MED/0330/2012]
- [SFRH/BD/40279/2007]
- [SFRH/BPD/73941/2010]
- [SFRH/BPD/79778/2011]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/79778/2011] Funding Source: FCT
Ask authors/readers for more resources
We report the synthesis and characterization of several salan-type Cu-II complexes. Suitable crystals suitable for X-ray diffraction were obtained for several of the CuII complexes, including a half-salen compound, revealing square-planar coordination environments common to d(9) species. The Cu-II-salan complexes are tested as catalysts in sulfoxidation, alkene oxidation, and oxidative naphthol coupling. At room temperature the compounds exhibit low to moderate catalytic activity in sulfoxidations and alkene oxidations, but no activity in oxidative naphthol coupling. The saturated coordination environments around the Cu centers probably are the main reason for the lower catalytic activities compared to the Ti- and V-salan analogs. Spectroscopic and mass spectrometry studies revealed that the Cu-II-salan complexes decompose, in the presence of H2O2, significantly faster at 40 degrees C than at room temperature. The catalytic activity observed is probably due to the Cu-II-salan degradation products, observed in the mass spectrometry studies, and not to the original Cu-II-salan precursors. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available