ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Grafting of the new unsymmetrical salamo complex of Mn (II) on MCM-41 and its use as a heterogeneous catalyst for the epoxidation of alkenes in the presence of H₂O₂ as an oxidant

Majid Kandi, Goldasteh Zarei, Farrokh Roya Nikmaram, and Jamshid Najafpour

Department of Chemistry, College of Science, Yadegar-E-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

E-mail: goldasthe@yahoo.com

Received: 30 December 2023  Accepted: 17 June 2024

Abstract:

The new Mn (II) complex of the “salamo” salen ligand of unsymmetrical oxime was synthesized and immobilized on MCM-41 by the multi-grafting method. The immobilized unsymmetrical salamo complex of manganese (MCM-41-Mn salamo) was used as a catalyst in the epoxidation of the alkenes with H₂O₂. The effect of various reaction parameters which may affect the conversion such as reaction time, temperature, amount of catalyst, oxidant and imidazole was investigated. The prepared Mn catalyst exhibited excellent reusability and could be reused at least five times without significant leaching or loss of activity.

Keywords: MCM-41; Immobilization; Grafting; Manganese complex; Heterogeneous catalyst

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-024-03631-y

Chemical Papers 78 (16) 8577–8586 (2024)