title: Enantioselective self-assembly of bimetallic [Mn(II) (delta)-Cr(III)(C2O4)3]- and [Mn(II) (lambda)-Cr(III)(C2O4)3]- layered anionic networks templated by the optically active (Rp)- and (Sp)-[1-CH2N(n-C3H7)3-2-CH3-C5H3Fe-C5H5]+ ions.
abstract: The ferrocenic ammonium (Rp)- and (Sp)-[1-CH2NR(3-)-2-CH3-C5H3Fe-C5H5] iodide salts with R=CH3, C2H5, n-C3H7, n-C4H9, were synthesized starting from the (Rp)- and (Sp)-[1-CH2N(CH3)2-2-CH3-C5H3Fe-C5H5] amines obtained in their optically active forms through asymmetric cyclopalladation of [C5H5Fe-C5H4CH2N(CH3)2]. 1H NMR studies of these planar chiral 1,2-disubstituted ferrocenic ammonium iodide salts in the presence of the (Delta)-(tris(tetrachlorobenzenediolato)phosphate(V) anion), [(Delta)-Trisphat] support the formation of specific diastereomeric ion pairs. Such intermolecular interactions can be related to the self-assembly of the two-dimensional optically active compounds [[(Sp)-1-CH2N(n-C3H7)3-2-CH3-C5H3Fe-C5H5][Mn (Delta)-Cr(C2O4)3]] and [[(Rp)-1-CH2N(n-C3H7)3-2-CH3-C5H3Fe-C5H5][Mn (Lambda)-Cr(C2O4)3]] starting from the resolved (Rp)- and (Sp)-[1-CH2N(n-C3H7)3-2-CH3-C5H3Fe-C5H5]+ ion associated to the racemic anionic building block rac-[Cr(C2O4)3]3- and Mn2+. Both enantiomeric forms of the networks behave as ferromagnets with a Curie temperature of 5.7 K.
authors.affiliation: Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR-CNRS 7071, Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, 75252 Paris 05, France. gruselle@ccr.jussieu.fr
authors.forename: Michel
authors.initials: M
authors.lastname: Gruselle
authors.forename: René
authors.initials: R
authors.lastname: Thouvenot
authors.forename: Bernard
authors.initials: B
authors.lastname: Malézieux
authors.forename: Cyrille
authors.initials: C
authors.lastname: Train
authors.forename: Patrick
authors.initials: P
authors.lastname: Gredin
authors.forename: Tatiana V
authors.initials: TV
authors.lastname: Demeschik
authors.forename: Ludmila L
authors.initials: LL
authors.lastname: Troitskaya
authors.forename: Viatcheslav I
authors.initials: VI
authors.lastname: Sokolov