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