Abstract
New Cu(II) compounds of pyridine-2,6-dicarboxylic acid with substituted pyrimidines as additional monodentate ligands have been synthesized and structurally characterized. The geometry for Cu(II) is distorted octahedral for one case and distorted square pyramidal for the others. Inter- and intramolecular hydrogen bonding plays an important role in the packing of the compounds. [Display omitted]
► Three new Cu(II) compounds with the ligand pyridine-2,6-dicarboxylate are reported. ► Coordination sphere of Cu by tridentate pyridine-2,6-dicarboxylate is completed by a monodentate pyrimidine with 1 or 2 H2O. ► Both inter- and intramolecular hydrogen bondings stabilize the structure and the packing.
Three new Cu(II) compounds of pyridine-2,6-dicarboxylic acid (H2pdc) with substituted pyrimidines as additional ligands have been synthesized and structurally characterized using X-ray diffraction, i.e. [Cu(pdc)(4HOpym)(H2O)2](H2O)2 (1) (4HOpym=4-hydroxypyrimidine), [Cu(pdc)(anpym)(H2O)] (2) (anpym=2-amino-5-nitropyrimidine) and [Cu(pdc)(clnpym)(H2O)](H2O) (3) (clnpym=2-chloro-4-nitropyrimidine). The three compounds are further characterized by IR, EPR and ligand field spectroscopy. The geometry around the Cu(II) ions is distorted octahedral for (1) and distorted square pyramidal for (2) and (3). Inter- and intramolecular hydrogen bondings play an important role in the structure and packing of the compounds.