Ciclo Conferencias ISQCH 2022: “Modulation of Axial Intra- and Intermolecular Interactions of d8 Metal Complexes” .- Jueves 31 de marzo
El jueves 31 de marzo a las 12:00 hora tendrá lugar la conferencia que impartirá Daron E. Janzen (St. Catherine University; St. Paul, Minnesota, USA). Se titula "Modulation of Axial Intra- and Intermolecular Interactions of d8 Metal Complexes". La charla se realizará en el Salón de Actos del edificio B (Matemáticas) de la Facultad de Ciencias.
Resumen
Square planar d8 transition metal complexes provide unique opportunities for reactivity and solid-state properties that are employed in catalysis, nanoscale devices, and crystal engineering amongst others. Open coordination sites provide sites for “weak” inter- and intramolecular interactions that can radically alter physical properties of d8 metal complexes. Macrocycles including the thiacrown 1,3,7-trithiacyclononane (9S3) with facial coordination preferences are mismatched with d8 metals preference for square planar structures, leading to M…S axial interactions consistently longer than M-S bonds but shorter than van der Waals radii. Strategies to modulate these “weak” interactions will be presented, including counter ligands, metal-metal dative bonding, donor atom modifications, and macrocycle ring size. A variety of behaviors comparing solution and solid-state structures including persistent, hemilabile, and non-persistent axial interactions will be described. Recent developments including a temperature induced reversible singlecrystal-to-single-crystal transformation with axial interaction changes accompanied by striking color changes will be presented.
