Antiferromagnetic Transition in a Novel Star-shaped High-spin Fe(III) Tetranuclear Cluster from a Mononuclear Coordination Anion Featuring pi-Extended Schiff Base Ligands

Takahashi K; Kawamukai K; Mochida T; Sakurai T; Ohta H; Yamamoto T; Einaga Y; Mori H; Shimura Y; Sakakibara T; Fujisawa T; Yamaguchi A; Sumiyama A

Chemistry Letters, Vol.44, No.6, 840-842, 2015

Takahashi K, Kawamukai K, Mochida T, Sakurai T, Ohta H, Yamamoto T, Einaga Y, Mori H, Shimura Y, Sakakibara T, Fujisawa T, Yamaguchi A, Sumiyama A

A novel star-shaped high-spin Fe(III) tetranuclear cluster was unexpectedly obtained by the reaction of an [Fe-III(phsal)(2)](-) anion with an Fe(III) coordination cation (H(2)phsal: N-(2-hydroxyphenyl)salicylaldimine). Despite a star-shaped Fe(III) tetranuclear structure similar to reported Fe(III) single molecule magnets, the present compound exhibited a bulk antiferromagnetic transition at 0.6 K due to a magnetic exchange coupling through intercluster pi-stacking interactions.