A new system for molecular recognition: Highly specific inclusion of ()-isopropyl phenyl sulfoxide by solid ()-phenylglycyl-()-phenylglycine

Abstract Solid ( R )-phenylglycyl-( R )-phenylglycine (( R , R )-1) included ( S )-isopropyl phenyl sulfoxide (( S )-2) from its racemic mixture with a high enantiomeric excess. The intermolecular interactions involved in this inclusion are discussed.