Supramolecular interactions in a family of dinuclear helicates in the solid-state |
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Authors: | Benjamin H. Wilson Paul E. Kruger |
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Affiliation: | 1. MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury , Christchurch, New Zealand;2. Department of Chemistry and Biochemistry, University of Windsor , Windsor, Ontario, Canada bwilson@uwindsor.ca https://orcid.org/0000-0003-3739-7489;4. MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury , Christchurch, New Zealand https://orcid.org/0000-0003-4847-6780 |
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Abstract: | ABSTRACT Metallo-helicates are a commonly encountered assembly within supramolecular chemistry. Interest in these architectures stems from their inherent helical chirality which positions them for a diverse range of applications such as catalysis and non-linear optics (NLO). The current study uses Co(II) dinuclear double helicates as versatile supramolecular synthons. The ditopic ligand, L, features two tridentate quinolinyl-hydrazone binding sites imparting it with hydrogen bond donors and π-faces for secondary supramolecular interactions. Incorporation of L into [Co2(L)2]4+ helical assemblies results in a helical cationic supramolecular synthon with moieties predisposed to forming π-π stacking and hydrogen bond interactions. The single-crystal X-ray structures of [Co2(L)2]X4 (X = ClO4 ?, BF4 ? and CF3SO3 ?) revealed a variety of anion dependent hydrogen bond networks arising through the interaction of the hydrazide hydrogen with the anion. These interactions in turn strongly influence the nature of the π-π stacking interactions of the quinoline moieties which can be analysed via the Hirshfield surface. |
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Keywords: | Metallo-helicate coordination chemistry crystallography |
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