Metal exchange study of pyrogallol[4]arene based dimers†
Abstract
The synthesis, the single-crystal X-ray structure, and a metal-exchange study of a zinc-seamed C-hexylpyrogallol[4]arene/PgC6Zn dimer are reported. The packing arrangement of the PgC6Zn dimer shows interdigitation between the C-hexyl tails. Neighboring dimeric nanocapsules are slightly offset with respect to each other, with CH⋯π interactions between the hexyl tails and the external pyridine ligands. In situ metal exchange with nickel nitrate does not result in expulsion of zinc metal centers from a pre-formed dimer, a result suggesting a framework robustness that may make formation of (magnetically interesting) mixed-metal dimers difficult. The suggested robustness of zinc-seamed pyrogallol[4]arene-based dimers is supported by quantum chemical calculations on related PgC0Zn and PgC3Zn dimers.
- This article is part of the themed collection: Form and Function of Molecular Cups and Capsules