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Hydrogen bonding supramolecular networks of copper(II) 2-choronicotinate complexes with picolinamide, nicotinamide, N-methyl-nicotinamide, 2-pyridylmethanol and 4-pyridylmethanol: Hirshfeld surface analysis and spectral properties

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The crystal and molecular structure of copper(II) 2-chloronicotinate (2-Clnic) of the composition [Cu(2-Clnic)2(pia)2] (pia = Picolinamide) (1), [Cu(2-Clnic)2(nia)2] (nia = Nicotinamide) (2), [Cu(2-Clnic)2(nia)2(H2O)]·H2O (3), [Cu(2-Clnic)2(mna)2(H2O)2] (mna = N-methylnicotinamide) (4), [Cu(2-Clnic)2(2 pm)2] (2 pm = 2-Pyridylmethanol) (5), and [Cu(2-Clnic)2(4 pm)2(H2O)2]·2H2O (4 pm = 4-Pyridylmethanol) (6) were determined by single-crystal X-ray analysis. Crystal structures of the respective complexes are monomeric with a different composition of coordination sphere about Cu(II) atom. The arrangement about Cu(II) in all coordination compounds are pseudooctahedral trans-coordinated, where carboxylic groups are bidentate (2,3) or monodentate (1,36) coordinated to atom copper. The molecules of all compounds are connected by strong N–H···O, N–H···N and/or O–H···O hydrogen bonds. EPR spectra of powder complexes 16 were measured and computer-simulated.

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Acknowledgements

We thank to Prof. Tadeusz Lis for measuring data of 4 and 6. We thank Slovak Research and Development Agency (APVV-15-0053, APVV-17-0513 and APVV-18-0016), Slovak Grant Agency (VEGA 1/0639/18 and 1/0482/20). M.M. thanks Ministry of Education, Science, Research and Sport of the Slovak Republic for funding within the scheme “Excellent research teams”. This article was created with the support of the Ministry of Education, Science, Research and Sport of the Slovak Republic within the Research and Development Operational Program for the project “University Science Park of STU Bratislava”, ITMS 26240220084, co-funded by the European Regional Development Fund.

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Correspondence to Jan Moncol.

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This work was presented at the International Conference on Coordination and Bioinorganic Chemistry held in Smolenice on June 2–7, 2019.

Some preliminary results have been presents as communication on 21th International Conference on Coordination and Bioinorganic Chemistry (Moncol et al. 2007b).

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Jozefikova, F., Kuckova, L., Lokaj, J. et al. Hydrogen bonding supramolecular networks of copper(II) 2-choronicotinate complexes with picolinamide, nicotinamide, N-methyl-nicotinamide, 2-pyridylmethanol and 4-pyridylmethanol: Hirshfeld surface analysis and spectral properties. Chem. Pap. 74, 3727–3740 (2020). https://doi.org/10.1007/s11696-020-01224-z

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