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Synthesis, structure, and properties of nickel(II) and copper(II) coordination polymers with the 5-ethyl-pyridine-2,3-dicarboxylate ligand

Synthesis, structure, and properties of nickel(II) and copper(II) coordination polymers with the... AbstractThe reactions of Ni(NO3)2 · 6H2O/Cu(OAc)2 · H2O, 5-ethyl-pyridine-2,3-dicarboxylic acid (H2epda), and 2,2′-bipyridine (2,2′-bipy) under hydrothermal condition produced two new coordination polymers [Ni(Hepda)2(H2O)2] (1) and [Cu(epda)(2,2′-bipy)] (2), which were characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. In 1, each NiII center is six-coordinated in a distorted NiO4N2 octahedral geometry. Adjacent structural units are joined by strong intermolecular O–H · · · O hydrogen bonding to generate a layered structure. In 2, the CuII centers are bridged by epda dianions to form chains, where the 2,2′-bipy ligands bristle out on two sides, establishing π-π stacking interactions, Adjacent chains are thus aggregated in layers. The magnetic properties of 1 and 2 were investigated, and the exchange interactions were found to be −1.62 and −2.24 cm−1, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zeitschrift für Naturforschung B de Gruyter

Synthesis, structure, and properties of nickel(II) and copper(II) coordination polymers with the 5-ethyl-pyridine-2,3-dicarboxylate ligand

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References (15)

Publisher
de Gruyter
Copyright
©2019 Walter de Gruyter GmbH, Berlin/Boston
ISSN
0932-0776
eISSN
1865-7117
DOI
10.1515/znb-2019-0037
Publisher site
See Article on Publisher Site

Abstract

AbstractThe reactions of Ni(NO3)2 · 6H2O/Cu(OAc)2 · H2O, 5-ethyl-pyridine-2,3-dicarboxylic acid (H2epda), and 2,2′-bipyridine (2,2′-bipy) under hydrothermal condition produced two new coordination polymers [Ni(Hepda)2(H2O)2] (1) and [Cu(epda)(2,2′-bipy)] (2), which were characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. In 1, each NiII center is six-coordinated in a distorted NiO4N2 octahedral geometry. Adjacent structural units are joined by strong intermolecular O–H · · · O hydrogen bonding to generate a layered structure. In 2, the CuII centers are bridged by epda dianions to form chains, where the 2,2′-bipy ligands bristle out on two sides, establishing π-π stacking interactions, Adjacent chains are thus aggregated in layers. The magnetic properties of 1 and 2 were investigated, and the exchange interactions were found to be −1.62 and −2.24 cm−1, respectively.

Journal

Zeitschrift für Naturforschung B – de Gruyter

Published: Jun 26, 2019

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