Synthesis and magnetic properties of a hybrid molecular salt [Fe(qsal)2][Fe(CA)(qsal)Cl]·MeNO2

• A reaction between [Fe(qsal)2]+ and CA2– yielded an ionic salt [FeIII(qsal)2]+[FeIII(CA)(qsal)Cl]–.
• Each cationic and anionic unit is self assembled through intermolecular π–π stacking interactions in the crystal lattice.
• Both FeIII ions were in HS spin states over the whole temperature region.

A new hybrid molecular salt [FeIII(qsal)2][FeIII(CA)(qsal)Cl]·MeNO2 (1), where qsal– = N-(8-quinolyl)salicylaldiminate and CA2– = chloranilate was synthesized and structurally characterized by single-crystal X-ray crystallography. Each cationic [FeIII(qsal)2]+ and anionic [FeIII(CA)(qsal)Cl]– unit is self assembled through intermolecular π–π stacking interactions between qsal– ligands, which stabilize the supramolecular networks in the crystal lattice. Magnetic measurements for 1 revealed that both FeIII ions were in HS spin states with a small contribution from ZFS over the whole temperature region.

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