Abstract
The synthesis, spectral characterization and crystal structure of two new nitrobenzoatocopper(II) complexes, namely, [Cu2(2-O2Nbz)4(nia)2]·ACN (1) and [Cu2(2-O2Nbz)4(ACN)2] (2) (where 2-O2Nbz = 2-nitrobenzoate, nia = nicotinamide and ACN = acetonitrile) are reported. The complexes 1 and 2 form dinuclear units of the paddle-wheel type around the crystallographic inversion centers. The copper ions are bridged by four 2-nitrobenzoate anions and the neutral N-donor ligands, viz. nicotinamide in 1 and acetonitrile in 2, are coordinated at apical positions. Selected geometric parameters of both complexes are compared with values for related tetra-2-nitrobenzoate complexes of copper(II) as well as the other dimeric copper(II) carboxylates with apical nicotinamide and acetonitrile ligands. The molecules of 1 are linked with N–H···O and C–H···O hydrogen bonds. The π–π stacking interactions in 1 are observed between benzene rings of 2-nitrobenzoate anions and pyridine rings of nicotinamide and also between acetonitrile molecules and benzene rings of 2-nitrobenzoate anions. The C–H···O hydrogen-bonds and CH/π interactions are observed in crystal structure of 2.
Graphical Abstract
The synthesis, spectral characterization and crystal structure of two new nitrobenzoatocopper(II) complexes, namely, [Cu2(2-O2Nbz)4(nia)2]·ACN and [Cu2(2-O2Nbz)4(ACN)2] (where 2-O2Nbz = 2-nitrobenzoate, nia = nicotinamide and ACN = acetonitrile) are reported. The both complexes form dinuclear units of the paddle-wheel type around the crystallographic inversion centers.
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We thank the Scientific Grant Agency of the Ministry of Education of Slovak Republic and the Slovak Academy of Sciences for financial support (1/0575/08 and 1/4454/07).
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Moncol, J., Vasková, Z., Stachová, P. et al. Self-Assembled Hydrogen-Bonding Chains of Copper(II) 2-Nitrobenzoate with Nicotinamide. J Chem Crystallogr 40, 179–184 (2010). https://doi.org/10.1007/s10870-009-9631-z
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DOI: https://doi.org/10.1007/s10870-009-9631-z