Incorporation of M(H2O)62+ between layers {M(H2O)2Ru2(CO3)4Cl2}n2n- (M = Zn, Mn): syntheses, structures and magnetic properties

Isostructural heterometallic diruthenium carbonates KM(H2O)(6)[M(H2O)(2)Ru-2(CO3)(4)Cl-2]center dot 4H(2)O [M = Zn (1) and Mn (2)] were synthesized from the reaction of the precursors [Ru-2(CO3)(4)Cl-2](5-) and transitional metal ions in aqueous solution. Complexes 1 and 2 show layered structures in which Ru-2(II,III) units are linked by four octahedral environment M(H2O)(2)(2+) ions in a cross fashion and vice versa giving a negative bimetallic square grid layer {M(H2O)(2)Ru-2(CO3)(4)Cl-2}(n)(3n-). M(H2O)(6)(2+) ions, linked by K+ forming zigzag chain {KM(H2O)(6)}(n)(3+), are located in the void spaces between the layers. The adjacent bimetallic carbonate layers are connected with K-O and K-Cl bonds, and hydrogen bonding, forming a supramolecular 3D framework structure. Their magnetic properties were characterized in detail, and intralayer ferromagnetic coupling between the Ru-2 dimer and Mn2+ ion, as well as long-range ordering (T-c = 5.2 K) coexistence of domain movement behavior were observed for complex 2.