科研之友
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摘要
The crystal structure of the title compound, [Cu(H2O)6](BF4)2﹞3C4H4N2O2, comprises discrete [Cu(H2O)6]2+ cations and BF4 anions along with three equivalents of pyrazine 1,4-dioxide (pzdo). The hexaaquacopper(II) ion and all three pzdo molecules lie about crystallographic inversion centers. The lattice is supported by an extensive hydrogen-bonding network. O〞H...O hydrogen bonding between the [Cu(H2O)6]2+ and pzdo units creates a pseudo-hexagonal lattice parallel to the bc plane. The BF4 anions lie in the voids of that lattice, held in place by O〞H...F hydrogen bonds, and also generate BF4 每pzdo每BF4 每pzdo stacks via short F...N contacts [2.866 (3)每3.283 (4) ].
