Hairpin helicates: a missing link between double-helicates and trefoil knots.
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.
Constable
Edwin C
EC
Department of Chemistry, University of Basel, Spitalstrasse 51, CH 4056, Basel, Switzerland. edwin.constable@unibas.ch
Figgemeier
Egbert
E
Hougen
Inger Annette
IA
Housecroft
Catherine E
CE
Neuburger
Markus
M
Schaffner
Silvia
S
Whall
Louise A
LA