Mono-β-diketiminate supported cerium(III) complex: Synthesis characterization and reactivity

• Published in: Polyhedron Vol. 249; pp. 116773 - 116779
• Main Authors: Sun, Xiong, Xie, Zhuoyi, Li, Shuyi, Cao, Hanfei, Fan, Yeli, Li, Pinggui, Zou, Lianghua
• Format: Journal Article
• Language: English
• Published: OXFORD Elsevier 01.02.2024
• Subjects: Chemistry; Chemistry, Inorganic & Nuclear; Crystallography; Physical Sciences; Science & Technology; beta-Diketiminate; Coordination; CRYSTAL-STRUCTURE; STRUCTURAL-CHARACTERIZATION; Organometallic; BOND-CLEAVAGE; AROMATIC-AMINES; Cerium(III); METHYL COMPLEXES; LOW-COORDINATE; CHEMISTRY; Rare earth metal; EARTH-METAL COMPLEXES; LIGAND; CATALYTIC-ACTIVITY
• ISSN: 0277-5387; 1873-3719
• DOI: 10.1016/j.poly.2023.116773

Mono-beta-diketiminate cerium(III) complex 1 was easily accessible from the anhydrous metal tribromide and LNa (L = N,N-2,6-diisopropylphenyl-2,4-pentanediimine anion) in THF at room temperature. Interaction of 1 with 1,2-dimethoxyethane, pyridine and 4-dimethylaminopyridine gave the ligand substitution products 2, 3 and 4 in good yield. All of those complexes exhibited molecular structure similar to that of 1, and the coordination environment around cerium center was the distorted octahedral geometry. The reaction of 1 with 2,6-dimethylphenyl isocyanide gave dinuclear complex 5 with an unusual triple bromine bridge in the molecule. It was worth noting that the reaction of 1 with one equivalent of cyclopentadienylsodium (CpNa) did not afford the mixed-ligand complex but the undesirable ligand redistributed product Cp2CeL (6). Treatment of 1 with arylamido lithium reagent whereas obtained the dissociated product 7. All the complexes were well characterized and further broadened the utility of beta-diketiminate ligands.