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Crystals of  μ -N,N′-bis-(2-dimethylaminoethyl)-oxamidato-diisothiocyanato copper(II) with dimethylformamide are monoclinic,  a  = 15.312 Å,  b  = 7.445 Å,  c  = 12.227 Å and  β  = 99°4′ containing two molecules in the unit cell of symmetry  P 2 1 / a . The structure was solved by the heavy-atom method using three-dimensional Fourier and difference Fourier syntheses. The refinement was carried out by block-diagonal matrix least-squares calculations including anisotropic temperature factors for all non-hydrogen atoms and isotropic temperature factors for hydrogen atoms. The final  R  index for 1507 non-zero reflections was 0.060. The molecule is centrosymmetric. The copper atom is surrounded by four atoms in a square planar environment with three Cu–N bonds, 1.937 Å, 1.909 Å, 2.092 Å and one Cu–O bond, 2.016 Å. The longer out-of-plane Cu–O distance, 2.293 Å links the oxygen atom of dimethylformamide.

The molecular and crystal structure of μ-N,N′-bis-(2-dimetliylaminoethyl)-oxamidato-diisothiocyanato-bisdimethylformamide copper(II)*