Rationally designed racemic and quasiracemic sulfonamidecinnamic acids assemble to give hydrogen-bonded dimers with coplanar alignment of neighboring olefins. The quasiracemate phase contains near inversion-related motifs with chemically distinct components forming supramolecular heterodimers that undergo asymmetric photodimerization.

A fresh Pasteur: Reconstruction of Pasteur's 1853 account of peculiar three‐component crystals has confirmed the identities of the two crystalline phases as ammonium (+)‐bitartrate (central crystal) and a quasiracemate of ammonium (+)‐bitartrate/(−)‐bimalate (adjoining crystal laths). The quasiracemate contains approximately inversion‐related molecular assemblies in which each bitartrate and bimalate component forms a homomeric catemeric motif.

and Grive, Rebecca C., "Enantiocontrolled solid-state photodimerizations via a chiral sulfonamidecinnamic acid" (2011). Faculty Research and Creative Activity. 12.

Neu aufgerollt: Durch Wiederholung eines von Pasteur 1853 beschriebenen Experiments gelang es, zwei kristalline Phasen als Ammonium‐(+)‐hydrogentartrat (Mittelteil der gezeigten Kristalle) und quasiracemisches Ammonium‐(+)‐hydrogentartrat/(−)‐hydrogenmalat (Stirnseiten der Kristalle) zu identifizieren. Das Quasiracemat besteht aus annähernd inversionssymmetrischen Molekülanordnungen, in denen die Hydrogentartrat‐ und Hydrogenmalat‐Komponenten ein homomeres Catemermotiv bilden.