Enantioselective Self-Assembly of Bimetallic[MnII (Δ)-CrIII(C2O4)3]− and[MnII (Λ)-CrIII(C2O4)3]− Layered Anionic Networks Templated by the Optically Active (Rp)- and (Sp)-[1-CH2N(n-C3H7)3-2-CH3C5H3FeC5H5]+ Ions

Autor: Patrick Gredin, René Thouvenot, Tatiana V. Demeschik, Michel Gruselle, Viatcheslav I. Sokolov, L. L. Troitskaya, Cyrille Train, Bernard Malézieux
Rok vydání: 2004
Předmět:
Zdroj: Chemistry - A European Journal. 10:4763-4769
ISSN: 1521-3765
0947-6539
DOI: 10.1002/chem.200305760
Popis: 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.
Databáze: OpenAIRE
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