title: Aza[6]helicene platinum complexes: chirality control of cis-trans isomerism.
abstract: It was serendipitously observed that cis-[PtCl2(NCEt)PPh3] reacted differently with either racemic or enantiopure 4-aza[6]helicene, giving respectively cis (racemic) and trans (enantiopure) [Pt(II)Cl2(4-aza[6]helicene)PPh3] complexes. This unexpected reactivity is explained through a dynamic process (crystallization-induced diastereoselective transformation) and enables a new aspect of reactivity in chiral transition-metal complexes to be addressed.
authors.affiliation: Sciences Chimiques de Rennes UMR 6226 - Institut de Physique de Rennes UMR 6251 CNRS-Université de Rennes 1, Campus de Beaulieu 35042 Rennes Cedex (France); Department of Chemistry, Materials and Chemical, Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano (Italy); CNR-ICRM, Via L. Mancinelli, 7, 20131 Milano (Italy).
authors.forename: Daniele
authors.initials: D
authors.lastname: Mendola
authors.forename: Nidal
authors.initials: N
authors.lastname: Saleh
authors.forename: Nicolas
authors.initials: N
authors.lastname: Vanthuyne
authors.forename: Christian
authors.initials: C
authors.lastname: Roussel
authors.forename: Loïc
authors.initials: L
authors.lastname: Toupet
authors.forename: Franca
authors.initials: F
authors.lastname: Castiglione
authors.forename: Tullio
authors.initials: T
authors.lastname: Caronna
authors.forename: Andrea
authors.initials: A
authors.lastname: Mele
authors.forename: Jeanne
authors.initials: J
authors.lastname: Crassous
keywords: chirality; cis-trans isomerism; complexation; helicenes; platinum