Surprising substituent effects on the self-assembly of helicates from bis(bipyridyl) BINOL ligands.
A number of different bis(bipyridyl) BINOL ligands were prepared using a convergent building block approach. These were studied with regard to their ability to undergo self-assembly to dinuclear helicates upon coordination to suitable late-transition-metal ions. Surprisingly, the substituents at the periphery of the ligand structure were found to have a marked influence on the outcome of the self-assembly processes with regard to the helicates composition, the stereoselectivity of the helicate formation, their redox reactivity, and their electronical properties as scrutinized by NMR- and CD-spectroscopic methods as well as ESI-mass spectrometric methods.
Bunzen
Jens
J
Kekulé Institute of Organic Chemistry und Biochemistry, University of Bonn, Gerhard-Domagk-Str. 1, Bonn 53121, Germany.
Hovorka
Rainer
R
Lützen
Arne
A