Template-Directed Self-Recognition of Alkyl-Bridged Bis(catechol) Ligands in the Formation of Helicate-Type Complexes

Markus Albrecht; Matthias Schneider; Herbert Röttele

doi:10.1002/(SICI)1521-3773(19990215)38:4<557::AID-ANIE557>3.0.CO;2-S

Template-Directed Self-Recognition of Alkyl-Bridged Bis(catechol) Ligands in the Formation of Helicate-Type Complexes

Angew Chem Int Ed Engl. 1999 Feb 15;38(4):557-559. doi: 10.1002/(SICI)1521-3773(19990215)38:4<557::AID-ANIE557>3.0.CO;2-S.

Authors

Markus Albrecht¹, Matthias Schneider¹, Herbert Röttele¹

Affiliation

¹ Institut für Organische Chemie der Universität, Richard-Willstätter-Allee, D-76131 Karlsruhe (Germany), Fax: (+49) 721-698529.

PMID: 29711774
DOI: 10.1002/(SICI)1521-3773(19990215)38:4<557::AID-ANIE557>3.0.CO;2-S

Abstract

A controlling influence on the self-assembly in the complexation reaction of a mixture of methylene- and ethylene-bridged bis(catechol) ligands (1-H₄ and 2-H₄ , respectively) with titanium(IV) ions is exerted by alkali metal cations (see scheme). Thus, not a complicated mixture of complexes, but as a result of a self-recognition of the ligands only well-defined products are formed.

Keywords: Alkali metals; Helical structures; Supramolecular chemistry; Titanium.