Syntheses,Crystal Structures and Magnetic Studies of Heterobimetallates Based on Paramagnetic Ruthenium(Ⅲ) Building Block [Ru~Ⅲ(salchda)(CN)_2]

The syntheses, crystal structures and magnetic properties of two cyano-bridged heterobimetallic compounds prepared from a paramagnetic Ru Ⅲ building block, transK[RuI II(salchda)(CN)_2](1, salchda = N,N?-bis(salicylidene)-o-cyclohexylenediamine), are described.1 reacts with hydrated CoCl_2 and [Mn Ⅲ(salchda)(Cl)(H_2O)] in MeOH to produce a trinuclear compound {[Ru~Ⅲ(salchda)(CN)]_2(μ-CN)_2[Co(MeOH)_4]?4MeOH}_n(2) and a dinuclear{[Ru~Ⅲ(salchda)(CN)](μ-CN)[Mn~Ⅲ(salchda)(MeOH)]?2MeOH}n(3), respectively. Both compounds exhibit intramolecular ferromagnetic coupling between Ru~Ⅲ and 3-d metal centers via the cyano bridge and intermolecular antiferromagnetic coupling. Moreover, 2 exhibits antiferromagnetic ordering below 3.4 K.