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Hairpin helicates: a missing link between double-helicates and trefoil knots
Edwin C Constable1, Egbert Figgemeier, Inger Annette Hougen
1Department of Chemistry, University of Basel, Spitalstrasse 51, CH 4056, Basel, Switzerland. edwin.constable@unibas.ch
Dalton Transactions (Cambridge, England : 2003)
|March 23, 2005
Abstract:
We have prepared a novel ligand in which two qpy metal-binding domains are linked by a polyoxyethylene spacer. The new ligand reacts with copper(ii) salts to form dinuclear double helicates with a hairpin structure. The hairpin complex and a model complex have been structurally characterised. The hairpin structure is formed regioselectively as the head-to-tail (HT) stereoisomer. Detailed electrochemical and spectroelectrochemical studies of the complexes are reported.