Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 153, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.inoche.2023.110792
Keywords
Coordination cage; Silver catalyst; Oxazoline; Crystal structure; Cyclopropanation
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Coordination cages have gained significant attention due to their well-defined cavities and diverse potential applications. In this study, a new symmetrical tripodal oxazoline-based ligand was synthesized and used to form coordination cage compounds. A novel M3L2-type crystalline coordination cage complex was obtained through the reaction between the ligand and AgPF6, which exhibited three-dimensional supramolecular networks formed by noncovalent interactions. Furthermore, the obtained cage complex showed excellent catalytic performance in the cyclopropanation reaction.
Coordination cages have attracted considerable attention recently due to the well-defined cavities and varied potential applications in different fields. In this work, a new tripodal oxazoline-based ligand with C-3 symmetry, tris(4-(4,5-dihydrooxazol-2-yl)phenyl)amine (TOPA), was synthesized and employed to constitute coordination cage compounds. By the reaction of TOPA and AgPF6 at room temperature, a novel M3L2-type crystalline coordination cage complex was obtained with the formula of {[Ag-3(TOPA)(2)]center dot(PF6)(3)}(1). In this complex, the adjacent two ligands coordinated with three Ag+ ions to form a coordination cage and these cages further generate the three-dimensional (3D) supramolecular networks through noncovalent interactions including hydrogen bond, C-H...pi and F.Ag interactions. Moreover, cage complex 1 exhibited good catalytic performance in the cyclopropanation of styrene with methyl 2-diazo-2-(4-methoxyphenyl)acetate.
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