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Crystal structure of an unsymmetrical Schiff base, immobilization of its cobalt and manganese complexes on a silica support, and catalytic studies

Abstract

An unsymmetrical tetradentate Schiff base (H2L) was synthesized by the reaction of 3-methoxysalicylaldehyde, o-phenylenediamine, and salicylaldehyde in EtOH. H2L was characterized by single-crystallographic X-ray analysis. Its Co(II) and Mn(III) complexes ([CoL] and [MnLCl]) were prepared and immobilized on 3-aminopropyltriethoxysilane functionalized silica gel. The immobilized materials were found to be efficient catalysts for epoxidation of styrene in the presence of tert-BuOOH in acetonitrile at 40 °C. The catalysts can be reused several times without significant loss of performance.

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Acknowledgments

The authors thank the Scientific and Technological Research Council (TÜBİTAK) for financial support (Project Number 109T416). Also, the authors are grateful to Anadolu University and the Medicinal Plants and Medicine research Centre of Anadolu University, Eskişehir, Turkey, for the use of X-ray Diffractometer.

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Correspondence to Cahit Demetgül.

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Durak, D., Delikanlı, A., Demetgül, C. et al. Crystal structure of an unsymmetrical Schiff base, immobilization of its cobalt and manganese complexes on a silica support, and catalytic studies. Transition Met Chem 38, 199–206 (2013). https://doi.org/10.1007/s11243-012-9678-0

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  • DOI: https://doi.org/10.1007/s11243-012-9678-0

Keywords

  • Styrene
  • Epoxidation
  • Schiff Base
  • TBHP
  • Schiff Base Complex