Synthesis, Structure, and Magnetic Properties of [(S)-[PhCH(CH3)N(CH3)3]][Mn(CH3CN)2/3Cr(ox)3]·(CH3CN)_(solvate), a 2D Chiral Magnet Containing a Quaternary Ammonium Chiral Cation

The synthesis, structure, and magnetic properties of a novel oxalate-based bimetallic magnet obtained by using the chiral (S)-trimethyl-(1-phenyl-ethyl)-ammonium, ((S)-[PhCH(CH3)N(CH3)3]+), cation as template is reported. This compound can be formulated as [(S)-[PhCH(CH3)N(CH3)3]][Mn(CH3CN)_Cr(ox)3] (CH3CN)_(solvate), and it crystallizes in the chiral trigonal space group P3. It shows a distorted two-dimensional honeycomb structure formed by MnIII and CrIII ions connected through oxalate anions with [(S)-[PhCH(CH3)N(CH3)3]+ cations and solvent molecules intercalated between the oxalate layers. Two-thirds of the MnII ions of the honeycomb anionic network are heptacoordinated. This compound behaves as a soft ferromagnet with an ordering temperature of 5.6 K. [ABSTRACT FROM AUTHOR]