title: Chiral hexanuclear ferric wheels.
abstract: The homochiral iron(III) wheels [Fe(6){(S)-pedea}(6)Cl(6)] and [Fe(6){(R)-pedea)}(6)Cl(6)] [(R)- and (S)-2; pedea = phenylethylaminodiethoxide] exhibit high optical activities and  antiferromagnetic exchange. These homochiral products react with each other, producing the centrosymmetric, crystallographically characterized [Fe(6){(S)-pedea}(3){(R)-pedea}(3)Cl(6)] diastereomer [(RSRSRS)-2]. (1)H NMR and UV-vis studies indicate that exchange processes are slow in both homo- and heterochiral systems but that, upon combination, the reaction between (R)- and (S)-2 occurs quickly.
authors.affiliation: Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: John
authors.initials: J
authors.lastname: Fielden
authors.forename: Manfred
authors.initials: M
authors.lastname: Speldrich
authors.forename: Claire
authors.initials: C
authors.lastname: Besson
authors.forename: Paul
authors.initials: P
authors.lastname: Kögerler
mesh_terms: D002942:Circular Dichroism; D018360:Crystallography, X-Ray; D005290:Ferric Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D013237:Stereoisomerism
chemical_list: D005290:Ferric Compounds