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Figure 1 . Showing the contents of the asymmetric unit with complete ethylenediammonium cations (generated by symmetry codes 1-x, 1-y, 1-z and 2-x, −y, 2-z). Hydrogen bonding between cations and perchlorate anions, neutral Ni(salen), and N,N′-dimethylformamide solvate molecule is shown by dashed lines. For clarity only the Ni, Cl O and N (from diammonium cations) atoms are labeled. |