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Figure 4
Fragment of the crystal structure of II showing the hydrogen bonds (dashed lines) between carboxyl­ate groups of the acid H4L and the non-coordinated oxygen atoms of the sulfate anions. H atoms at C atoms and methyl­ene groups in benzene rings are not shown. The coordination environment of the NiII ions is shown in polyhedral presentation. Symmetry code: (i) x, −y + [{1\over 2}], z − [{1\over 2}].

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 81| Part 2| February 2025|
https://doi.org/10.1107/S2056989024012337
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