A new 3s–3d heterometallic polymer containing N-methyliminodiacetic acid: synthesis, structure and characterization

A new complex {[Na2(H2O)3(µ-L)2Cu]4}∞ (L = N-methyliminodiacetic acid) has been synthesized and structurally characterized. The complex crystallizes in the monoclinic, space group C2/c, with the unit cell parameters a = 16.556(3) A, b = 8.0622(13) A, c = 12.671(2) A, α = 90°, β = 95.849(2)°, γ = 90°. The central metal Cu (II) ion is coordinated with two nitrogen atoms and four oxygen atoms belonging to two ligands. Simultaneously, the sodium is six-coordinated with oxygen atoms coming from the ligand and water molecule; the sodium atoms related are bridged by oxygen atoms, forming a sodium chain. The structure consists of CuL2 moieties linked by sodium chain via the exo oxygen atoms of two ligands, forming a novel three-dimensional structure. Moreover, elemental analysis, IR, UV-vis, ESR spectroscopy and thermal stability were determined. Copyright © 2007 John Wiley & Sons, Ltd.