OICC Press Iranian Journal of Catalysis 2345-4865 12 2 2022 05 24 Synthesis and Characterization of Hybrid Dual Metallic Complexes of Schiff Base Containing (Cd and Mn/Fe/Co/Ni) Derived from Isatin and 1,4-Phenylenediamine As Novel Organometallic Catalysts for Rapid and Efficient Epoxidation of Alkenes 10.30495/ijc.2022.691408 EN Abeer Salim Mohammed Department of Chemistry, College of Education for Pure Sciences, University of Mosul, Iraq Jassim M. Alyass Department of Chemistry, College of Education for Pure Sciences, University of Mosul, Iraq Khalaf Ibrahim Khallow Department of Chemistry, College of Education for Pure Sciences, University of Mosul, Iraq Journal Article 2022 05 24 In the current study, a new methodology for the epoxidation of alkenes was developed. In this regard, the required ligand was synthesized from the reaction of isatin and 1,4-phenylenediamine to afford (3Z,3'Z)-3,3'-(1,4-phenylenebis(azaneylylidene))bis(indolin-2-one) ligand. Then, the two coordinate ligands were metallated using Cd and Mn/Fe/Co/Ni to obtain a series of hybrid dual metallic complexes containing (Cd and Mn/Fe/Co/Ni). The prepared complexes were characterized using FT-IR spectroscopy, UV-Vis spectroscopy, CHNS analysis, and magnetic susceptibility. Then, the prepared hybrid dual metallic complexes containing (Cd and Mn/Fe/Co/Ni) are used in the epoxidation of different alkenes to afford corresponding epoxides in moderate to good yields. The synthesized complexes were checked relative to recoverability and leaching of metal to the medium of the reaction. Highlights Four types of hybrid dual metallic complexes containing (Cd and Mn/Fe/Co/Ni) were synthesized. The prepared organometallic complexes were active and efficient in epoxidation of alkenes. The TOF of catalysts were obtained up to 1428 h-1.