A rod-shaped guest leads to architectural isomerism in a multicomponent crystalline framework based on a resorcin[4]arene

Abstract

Cocrystallization of C-methylcalix[4]resorcinarene 1 with 4,4′-bipyridine 2 in the presence of 4-bromobiphenyl (4-brbp) yields a molecular solid, of composition 3d·(4-brbp), [where 3d = 1·2(2)], in which 1 assembles with 2 to form a one-dimensional hydrogen-bonded polymer 3d that includes two copies of the biphenyl, within elliptical cavities of dimensions ∼ 11 × 7 × 6 Å, as guests. The framework 3d represents a third architectural isomer of three previously reported supramolecular isomers of the parent material 3. © 2001 American Chemical Society.