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Poly[[diaquadi-μ2-cyanido-bis(μ2-pyrazine-2-carboxylato)dicopper(I)copper(II)] dihydrate]

Author(s): Guang Fan | Jia-juan Sun | Min-yan Zheng | San-ping Chen | Sheng-Li Gao

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 67;
Issue: 7;
Start page: m822;
Date: 2011;
Original page

In the title compound, {[CuIICuI2(C5H3N2O2)2(CN)2(H2O)2]ยท2H2O}n, the CuII atom lies on an inversion centre and is octahedrally coordinated by two N atoms and two O atoms from opposing pyrazine-2-carboxylate (2-pac) ligands and two water O atoms. The CuI atom has a triangular geometry, coordinated by one N atom and one C atom from two bridging cyanide ligands, and another N atom from the 2-pac ligand. The three-dimensional structure features a succession of two-dimensional sheets containing [Cu(CN)]n chains linked by Cu(2-pac)2(H2O)2 groups. The coordinated and free water molecules are involved in an extended three-dimensional hydrogen-bond network with the 2-pac ligands.
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