title: Formation of [2 + 2] diruthenium(II) metallomacrocycles from ligands containing 2,2':6',2''-terpyridine domains linked through flexible polyethyleneoxy spacers.
abstract: The syntheses of three ligands containing two terpy metal-binding domains linked through flexible polyethyleneoxy spacers are described. These ligands have been utilised as building blocks in a two-step process for the formation of a series of dinuclear ruthenium(II) metallomacrocycles of the type [Ru2L2]4+. Employing a two-step methodology allows the formation of homoleptic ([Ru2L2]4+) and heteroleptic ([Ru2LL']4+) species in which the ligands differ in the length of the polyethyleneoxy spacer connecting each terpy motif. Homoleptic metallomacrocycles have been characterised through single crystal X-ray diffraction studies, while 2D-NMR spectroscopy has been employed for the characterisation of the heteroleptic species.
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: 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: Christopher B
authors.initials: CB
authors.lastname: Smith