Two novel 3D 3d–4f polymers with triethylenetetraaminehexaacetic acid: Syntheses, structures, and magnetic properties

Two novel 3d-4f polymers [La(H2O)(4)][M(2)TTHA(SCN)(2)]center dot H3O+ (M = Ni(1), Cu(2), H-6 TTHA = triethylenetetraaminehexaacetic acid) were synthesized and characterized by X-ray single-crystal diffraction, elemental analysis, IR and magnetic properties. Two complexes show 3D framework, comprising an unusual infinite 1D chain based on heterometallic La2M2 rings (M = Ni(1), Cu(2)). (c) 2007 Elsevier B.V. All rights reserved.