Inverted molecular cups: 1-D and 2-D Ag(I) coordination polymers from resorcinarene bis-thiacrowns
Helttunen, K., & Nissinen, M. (2016). Inverted molecular cups: 1-D and 2-D Ag(I) coordination polymers from resorcinarene bis-thiacrowns. CrystEngComm, 18(26), 4944-4951. https://doi.org/10.1039/C6CE00243A
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CrystEngCommDate
2016Copyright
© The Royal Society of Chemistry 2016. This is a final draft version of an article whose final and definitive form has been published by RSC. Published in this repository with the kind permission of the publisher.
Resorcinarene bis-thiacrown hosts 1–3 were prepared and crystallized with silver trifluoroacetate yielding one and two
dimensional Ag coordination polymers. The complexation of silver in exo-cavity fashion folds the thiacrown bridges
inwards transforming the resorcinarene hosts into inverted molecular cups. The silver cations were coordinated to the
resorcinarene ligands and trifluoroacetate anions, which act as monodentate or bidendate bridging ligands between the
metal ions. Argentophilic Ag···Ag (2.93–3.38 Å) interactions supported by two bridging carboxylate anions were found in
two of the structures, whereas longer Ag···Ag distances were observed if only one anion connected the silver cations. Both
the anion and the resorcinarene lower rim alkyl chain had a role in the crystal packing, as indicated by the different metal
coordination and packing tendencies of C-ethyl and C-pentyl bis-thiacrowns. A typical packing motif observed was a
polymer chain with end-to-end joints and two Ag ions with tetrahedral coordination geometries. Solvent channels or
discrete solvent pockets between the polymer layers were observed in all structures.
...
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