catena-Poly[[tetrakis(imidazole-N³)copper(II)]-μ-(dichromato-O:O')]

The title compound, [{Cu(C₃H₄N₂)₄}(Cr₂O₇)]_n, containing a [Cr(Him)₄]²⁺ cation (Him = imidazole) and a dichromate anion, was obtained by hydrothermal synthesis. Each Him ligand coordinates to the Cu atom via one N atom, forming a tetragonally elongated octahedral geometry with a basal plane defined by four coplanar imidazole N atoms, the axial sites being occupied by O atoms from two dichromato ligands. The dichromate anions bridge the Cu ions to form one-dimensional zigzag chains.

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