Solvent Dependence of the Monomer-Dimer Equilibrium of Ketone-Substituted Triscatecholate Titanium(IV) Complexes

A Carel N Kwamen; Judith Jenniches; Iris M Oppel; Markus Albrecht

doi:10.1002/chem.202001053

Solvent Dependence of the Monomer-Dimer Equilibrium of Ketone-Substituted Triscatecholate Titanium(IV) Complexes

Chemistry. 2020 Aug 17;26(46):10550-10554. doi: 10.1002/chem.202001053. Epub 2020 Jul 20.

Authors

A Carel N Kwamen¹, Judith Jenniches², Iris M Oppel², Markus Albrecht¹

Affiliations

¹ Institut für Organische Chemie, RWTH Aachen University, Landoltweg 1, Aachen, 52074, Germany.
² Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, Aachen, 52074, Germany.

Abstract

Hierarchical helicates based on ketone-substituted titanium(IV)triscatecholates show different monomer-dimer behavior depending on different solvents. The dimerization constants of a whole series of differently alkyl-substituted complexes is analyzed to show that the solvent has a very strong influence on the dimerization. Hereby, effects like solvophobicity/philicity, sterics, electronics of the substituents and weak side-chain-side-chain interactions seem to act in concert.

Keywords: helicates; intermolecular interactions; self assembly; solvent effect; thermodynamics.