The first 3D coordination polymer with cis-oxamidato-bridged and trans-oxamidato-bridged: Synthesis, crystal structure and magnetic properties

Using dissymmetrical copper(II) precursor, [Cu(oxbe)]2−, a novel coordination polymer, namely {[Cu(cis-oxbe)]2[Cu(trans-oxbe)]2CuNa2(DMF)2}n (1) (oxbe = N-benzoate-N′-(2-aminoethyl)oxamido) has been synthesized and characterized by IR, elemental analysis, X-ray crystal diffraction and magnetic properties. Single-crystal structural analysis shows that complex 1 consists of 3D framework containing both cis-oxamidato bridges and trans-oxamidato bridges, which is the first example that cis- and trans-oxamidato occur in the same structure. Its magnetic properties have also been investigated.