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Figure 1 Thermal ellipsoid plot of 1 (50% probability) showing the asymmetric unit and the three 1,4-pyrazinedioxide molecule that lie about inversion centers. Labeled atoms are related to unlabeled atoms by the symmetry operations: −x+1, −y+1, −z+1 for Cu(H2O)6,2+, −x, −y+1, −z for N11, C12 and C13; −1-x, −y, −z for N21, C22 and C23. Only those hydrogen atoms whose positions were refined and are involved in hydrogen-bonding are labeled. |