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Si10Cu6N4Cage Hexacoppersilsesquioxanes Containing N Ligands: Synthesis, Structure, and High Catalytic Activity in Peroxide Oxidations
- Source :
- Inorganic Chemistry; December 2017, Vol. 56 Issue: 24 p15026-15040, 15p
- Publication Year :
- 2017
-
Abstract
- The synthesis, composition, and catalytic properties of a new family of hexanuclear Cu(II)-based phenylsilsesquioxanes are described here. Structural studies of 17 synthesized compounds revealed the general principle underlying their molecular topology: viz., a central metal oxide layer consisting of two Cu3trimers is coordinated by two cyclic [PhSiO1.5]5siloxanolate ligands to form a skewed sandwich architecture with the composition [(PhSiO1.5)10(CuO)6]2+. In addition to this O ligation by the siloxanolate rings, two opposite copper ions are additionally coordinated by the nitrogen atoms of corresponding N ligand(s), such as 2,2′-bipyridine (compounds 1–9), 1,10-phenanthroline (compounds 10–13), mixed 1,10-phenanthroline/2,2′-bipyridine (compound 14), or bathophenanthroline (compounds 15–17). Finally, the charge balance is maintained by two HO–(compounds 1–7, 10–13, and 15–17), two H3CO–(compound 8), or two CH3COO–(compounds 9and 14) anions. Complexes 1and 10exhibited a high activity in the oxidative amidation oxidation of alcohols. Compounds 1, 10, and 15are very efficient homogeneous catalysts in the oxidation of alkanes and alcohols with peroxides.
Details
- Language :
- English
- ISSN :
- 00201669 and 1520510X
- Volume :
- 56
- Issue :
- 24
- Database :
- Supplemental Index
- Journal :
- Inorganic Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs44069772
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.7b02320