Ligand- and metal-exchange reactions of robust nickel complexes with pentagonal bipyramidal structures

Chem Asian J. 2024 Jan 18:e202301094. doi: 10.1002/asia.202301094. Online ahead of print.ABSTRACTThe coordination chemistries of transition metal complexes with pentagonal bipyramidal geometries were investigated, and the highly stable nature of a cyclic pentapyridyl ligand was disclosed. A NiCl2 complex with the pentapyridyl ligand was found to be stable toward water and acidic conditions. The stable complex underwent ligand-exchange reactions with nucleophilic reagents, and a series of pentagonal bipyramidal complexes with different apical ligands was prepared. Crystallographic analyses with the aid of theoretical calculations revealed that the complexes were constructed by electrostatic threading of a divalent linear nickel complex into the ring of the neutral, cyclic pentapyridyl, which resulted in robust water- and acid-resistant complexes with unique pentagonal bipyramidal structures. A reductive metal exchange reaction was then discovered, which enabled "linear divalent metal + electrostatic ring" formulations with different metal atoms.PMID:38236182 | DOI:10.1002/asia.202301094

Source: Chemistry, an Asian Journal - January 18, 2024 Category: Chemistry Authors: Koki Ikemoto Akira Miyachi Seungmin Yang Hiroyuki Isobe Source Type: research