Steric Restraints in Redox-Active Guanidine Ligands and Their Impact on Coordination Chemistry.

ABSTRACT: The introduction of redox-active ligands into coordination compounds is attractive for a number of applications; intramolecular electron transfer between a redox-active ligand and a metal is the basis for applications in switchable devices and advanced redox catalysis for multielectron substrate activations. A fine-tuning of the properties of redox-active ligands focusses on the redox potential and frontier orbital energies, as well as the steric demand and coordination mode. In this work, we report the first synthesis of new o-diguanidino-benzene ligands in which the two guanidino groups are connected through an alkyl chain of different length. The introduction of an ethylene bridge between the two guanidino groups turns a strongly coordinating ligand into a noncoordinating molecule, whil

SUBMITTER: Engels E 

PROVIDER: S-EPMC12648461 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature