(S)-(-)-(2-MeBu)N(Pr)2MeI Salt as Template in the Enantioselective Synthesis of the Enantiopure Two-Dimensional (S)-(-)-(2-MeBu)N(Pr)2Me[\LambdaMnΔCr(C2O4)3] Ferromagnet

Michel Gruselle (1) , Yanling Li (2) , Nikolay Ovanesyan (3) , Viktor Makhaev (3) , Gennadi Shilov (3) , Fedor Mushenok (3) , Cyrille Train (4) , Serguey Aldoshin (3)

1 A.R.C - Architectures Moléculaires
2 ERMMES - Equipe de Recherche en Matériaux Moléculaires et Spectroscopies
3 Institute of Problems of Chemical Physics of RAS
4 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble

We describe herein the synthesis of (rac)- or enantiopure (S)-(-)-(2-MeBu)N(Pr)2MeI ammonium salts. These racemic and enantiopure ammonium salts were used as cationic templates to obtain new two-dimensional (2D) ferromagnets [(rac)-(2-MeBu)N(Pr)2Me][MnCr(C2O4)3] and [(S)-(-)-(2-MeBu)N(Pr)2Me][ΔMn\Lambda nCr(C2O4)3]. The absolute configuration of the hexacoordinated Cr(III) metallic ion in the enantiopure 2D network was determined by a circular dichroism measurement. The structure of [(2-MeBu)N(Pr)2Me][MnCr(C2O4)3], established by single crystal X-ray diffraction, belongs to the chiral P63 space group. According to direct current (dc) magnetic measurements, these compounds are ferrromagnets with a temperature Tc = 6°K. Chirality 25:444\textendash448, 2013. \textcopyright 2013 Wiley Periodicals, Inc.

Mots clés: 2D chiral networks; ammonium salts; ferromagnets

Domaines: Chimie

Michel Gruselle, Yanling Li, Nikolay Ovanesyan, Viktor Makhaev, Gennadi Shilov, et al.. (S)-(-)-(2-MeBu)N(Pr)2MeI Salt as Template in the Enantioselective Synthesis of the Enantiopure Two-Dimensional (S)-(-)-(2-MeBu)N(Pr)2Me[\LambdaMnΔCr(C2O4)3] Ferromagnet. Chirality, 2013, 25 (8), pp.444--448. ⟨10.1002/chir.22179⟩. ⟨hal-02878862⟩