| pubmed-article:19402622 | pubmed:abstractText | A new family of polynuclear clusters containing the Fe(III)(3)M(II) cores [(Tp(4Bo))(6)Fe(6)(CN)(18)M(2)Na(2)(H(2)O)(16)] x 4 H(2)O (M = Cu, Co, Mn; 1-3) and [(Tp(4Bo))(6)Fe(6)(CN)(18)M(2)Na(2)(H(2)O)(12)(DMF)(4)] x H(2)O (M = Cu, Co, Mn; 4-6) have been synthesized and structurally characterized. Complexes 1-3 crystallize in the P2(1)/c space group, and 4-6 crystallize in the P2(1)/n space group. All six complexes consist of two symmetry-related T-shaped [(Tp(4Bo))(3)(CN)(9)Fe(3)M](-) subunits linked by two Na(+) cations. Each polynuclear cluster in 1-6 strongly interacts with 12 adjacent such units through pi-pi interactions, leading to the formation of 3D 12-connected frameworks. Magnetic studies show appreciable magnetic anisotropies in compounds 1, 2, 4, and 5. Antiferromagnetic interactions were observed in complexes 3 and 6. | lld:pubmed |
