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Figure 4
The two synthon types, (left) the R22(8) dimer and (right) the C(4) catemer, formed between two basic metal-based building units equipped with pyrazinone ligands. The pyrimidinone and quinazolinone ligands are prone to exhibit the same hydrogen-bond motifs.

IUCrJ
Volume 5| Part 1| January 2018| Pages 13-21
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517015494