Formation of [2 + 2] diruthenium(ii) metallomacrocycles from ligands containing 2,2′:6′,2″-terpyridine domains linked through flexible polyethyleneoxy spacers?

Dalton Transactions Pub Date: 2005-06-09 DOI: 10.1039/B504670J

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.

Graphical abstract: Formation of [2 + 2] diruthenium(ii) metallomacrocycles from ligands containing 2,2′:6′,2″-terpyridine domains linked through flexible polyethyleneoxy spacers
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