Year: 2026
Type: preprint
Abstract: An angle-based geometry index for the direct comparison of 8-coordinate molecular complexes is presented herein. The method was designed as a readily accessible tool to evaluate experimental coordination complexes via the degree of distortion between the three most common interconvertible 8-vertex polyhedra for molecular compounds: square antiprism, biaugmented triangular prism, and dodecahedron. Analogous to the well-established geometric analysis methods for 4- and 5-coordinate compounds (τ4 and τ5, respectively), τ8 assesses the geometry of an 8-coordinate compound based on the angles around the metal center formed through ligand coordination contrasting with other methods utilizing the angles between polyhedral faces. This is an alternative and complementary approach to evaluating the central metal geometries of 8-coordinate compounds, designed to bolster the growing field of high-coordinate metal complex chemistry and provide a readily implemented framework for comparative analysis.
Source: ChemRxiv
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7214620956