Crystal Structures, Hirshfeld Surfaces, and Thermal Study of Isostructural Polymeric Ladders of La(III) and Sm(III) Coordination Compounds with 4,4’-Bipyridine and Dibromoacetates
oleh: Agnieszka Czylkowska, Anna Pietrzak, Małgorzata Szczesio, Bartłomiej Rogalewicz, Jakub Wojciechowski
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2020-09-01 |
Deskripsi
Two novel mixed ligand complexes with general formula [M<sub>2</sub>(4,4′-bpy)<sub>1.5</sub>(CBr<sub>2</sub>HCOO)<sub>6</sub>(H<sub>2</sub>O)<sub>2</sub>]<sub>n</sub> (where 4,4′-bpy = 4,4′-bipyridine) were synthesized. Thermal analysis was used to describe a solid intermediate and final products of thermolysis. A coupled TG-MS system was used to monitor principal volatile fragments evolved during pyrolysis. Crystal structures of the complexes were determined. Cationic dinuclear M<sub>2</sub> (M(III) = La, Sm) coordination cores were obtained. Both crystal structures are isostructural. Single crystal X-ray diffraction analysis revealed that investigated structures of 1D coordination polymers assembled in ladder-like systems. The central atom replacement resulted in unit cell identity parameter П = 0.0091. Additionally, the isostructurality of the reported La(III) and Sm(III) complexes was revealed using Hirshfeld Surface analysis supported by Enrichment Ratio calculations.