The Quest for Chain-Link Hydrogen-Bonded Capsules: Self-Assembly of C-Methyl Calix[4]resorcinarene with 5,5‘-Bipyrimidine

The self-assembly of the tetradentate ligand 5,5‘-bipyrimidine with C-methyl calix[4]resorcinarene
is reported. The structures of three different three-dimensional hydrogen-bonded networks formed on self-assembly
are presented. Two structures contain ligand-bridged resorcinarenes with a “chain-link” capsule motif. The third
structure has the resorcinarenes diagonally cross-linked by the bipyrimidine ligand without forming distinct bridged
capsules.