Ferromagnetic Properties of a Trinuclear Nickel(II) Complex with a Trithiocyanurate Bridge

A novel trinuclear nickel(II) complex with N , N , N′ , N ″, N ″‐pentamethyldiethylenetriamine (pmdien) and a trithiocyanurate(3–) (ttc 3– ) bridge of composition [Ni 3 (pmdien) 3 (μ‐ttc)](ClO 4 ) 3 ( 1 ) was prepared. The X‐ray crystal structure of 1 was determined, revealing the tris‐N,S chelating mode of the trithiocyanurate bridge, forming a regular triangular Ni II 3 core. A deformed trigonal bipyramidal arrangement of the central atoms was further achieved by coordination of three pmdien N atoms. The complex shows a ferromagnetic exchange interaction among the Ni II magnetic centers that is tuned by single‐ion anisotropy and/or antisymmetric exchange. The complex orders ferromagnetically at T c = 10 K and exhibits spin‐glass properties.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)