[Zurück]

D. Müller, C. Knoll, M. Seifried, G. Giester, M. Reissner, P. Weinberger:
"N1-substituted tetrazole ligands as versatile building blocks for Fe(II) spin crossover compounds";
Poster: ECOSTBio: Final scientific workshop, Berlin; 09.04.2018 - 11.04.2018; in: "Final scientific workshop Berlin", K. Ray, C. Limberg (Hrg.); (2018).

As the elucidation of the factors governing the spin transition properties of iron(II) spin crossover compounds shows a subtle interplay of electronic factors (i.e. the ligand field strength of the respective ligands used) and stereochemical impacts (i.e. the packing of the individual molecules and their intermolecular interactions and stabilizations via H-bonds, π-π stacking, anions and/or solvent molecules, etc...) we want to derive trends within homologous series of a ligand system based on the extremely versatile N1-functionalized tetrazoles aiming for comparative studies. In recent years we developed new synthetic pathways beyond the classical Franke synthesis such as a microwave assisted synthesis or via cross-coupling methods thus allowing the preparation of a synthetic library of tetrazole ligands and their respective iron(II) spin crossover compounds. Starting off from a homologous series of Fe(II) complexes of n-alkyl N1-substituted tetrazoles, synthetic strategies towards Fe(II) complexes of iso- and cyclo-alkyl N1-substituted tetrazoles are presented as well as bridging ligand systems of α,ω-ditetrazoles with different alkyl- and aryl spacer. Furthermore, the impact of side-chain halogenation or substitution with main group (IV) elements are discussed.

tetrazole, iron(II), spin-crossover

https://publik.tuwien.ac.at/files/publik_269162.pdf