Ligand rigidity as a design principle for planar pentacoordinate fluorine
Abstract
Planar hypercoordinate fluorine is rare due to the high electronegativity of F. A Zn5O5 framework stabilizes D5h F©Zn5O5− as a global minimum. The bonding is predominantly electrostatic with a minor covalent contribution. A detachment energy of 6.29 eV places the cluster in the superhalogen regime.

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