title: Solid state optical activity of dichalcogenides: isolation by chiral crystallization and determination of absolute configuration.
abstract: [reaction--see text] Optically active diphenyl dichalcogenides were isolated in bulk for the first time by chiral crystallization. The absolute configuration of the P-helical enantiomer of diphenyl disulfide was determined by X-ray crystallography. On the basis of this determination and considering the similarities of the Cotton effects of diphenyl diselenide and ditelluride, the absolute configuration of optically active diphenyl dichalcogenides could be assigned. Furthermore, stereochemistry of chiral crystallization could be controlled by using an optically active crystal as a seed crystal.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
authors.forename: H
authors.initials: H
authors.lastname: Isono
authors.forename: M
authors.initials: M
authors.lastname: Yasui
authors.forename: F
authors.initials: F
authors.lastname: Iwasaki
authors.forename: N
authors.initials: N
authors.lastname: Kamigata
mesh_terms: D002599:Chalcone / Q000031:analogs & derivatives* / Q000138:chemical synthesis*; D002942:Circular Dichroism; D003460:Crystallization; D018360:Crystallography, X-Ray; D007202:Indicators and Reagents; D008968:Molecular Conformation; D013237:Stereoisomerism
chemical_list: D007202:Indicators and Reagents; D002599:Chalcone