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Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids
Two isostructural Ni(II) compounds, bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–2,5-dichloroterephthalic acid (1/1), [Ni(C(13)H(11)N(4)O)(2)](C(8)H(4)Cl(2)O(4)), and bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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International Union of Crystallography
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290543/ https://www.ncbi.nlm.nih.gov/pubmed/28217320 http://dx.doi.org/10.1107/S2056989016020326 |
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author | Nakanishi, Takumi Sato, Osamu |
author_facet | Nakanishi, Takumi Sato, Osamu |
author_sort | Nakanishi, Takumi |
collection | PubMed |
description | Two isostructural Ni(II) compounds, bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–2,5-dichloroterephthalic acid (1/1), [Ni(C(13)H(11)N(4)O)(2)](C(8)H(4)Cl(2)O(4)), and bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–2,5-dibromoterephthalic acid (1/1), [Ni(C(13)H(11)N(4)O)(2)](C(8)H(4)Br(2)O(4)), were synthesized and their crystal structures determined. The pair of N,N′,O-tridentate N-[1-(pyridin-2-yl-κN)ethyl]pyridine-4-carbohydrazonate L ligands result in a cis-NiO(2)N(4) octahedral coordination sphere for the metal ions. The asymmetric units consist of two half-molecules of the dicarboxylic acids, which are completed by crystallographic inversion symmetry. In the respective crystals, the 2,5-dichloroterephthalic acid (H(2)Cl(2)TPA, 1-Cl) molecules form zigzag hydrogen-bonded chains with the [Ni(L)(2)] molecules, with the hydrogen-bond distances in 1-Br slightly longer than those in 1-Cl. The packing is consolidated by aromatic π–π stacking between the dicarboxylic acid molecules and terminal pyridine rings in [Ni(L)(2)] and short halogen–halogen interactions are also observed. The qualitative prediction of the H-atom position from the C—N—C angles of the terminal pyridine rings in L and the C—O distances in the carboxyl groups show that 1-Cl and 1-Br are co-crystals rather than salts. |
format | Online Article Text |
id | pubmed-5290543 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-52905432017-02-17 Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids Nakanishi, Takumi Sato, Osamu Acta Crystallogr E Crystallogr Commun Research Communications Two isostructural Ni(II) compounds, bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–2,5-dichloroterephthalic acid (1/1), [Ni(C(13)H(11)N(4)O)(2)](C(8)H(4)Cl(2)O(4)), and bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ(2) N′,O}nickel(II)–2,5-dibromoterephthalic acid (1/1), [Ni(C(13)H(11)N(4)O)(2)](C(8)H(4)Br(2)O(4)), were synthesized and their crystal structures determined. The pair of N,N′,O-tridentate N-[1-(pyridin-2-yl-κN)ethyl]pyridine-4-carbohydrazonate L ligands result in a cis-NiO(2)N(4) octahedral coordination sphere for the metal ions. The asymmetric units consist of two half-molecules of the dicarboxylic acids, which are completed by crystallographic inversion symmetry. In the respective crystals, the 2,5-dichloroterephthalic acid (H(2)Cl(2)TPA, 1-Cl) molecules form zigzag hydrogen-bonded chains with the [Ni(L)(2)] molecules, with the hydrogen-bond distances in 1-Br slightly longer than those in 1-Cl. The packing is consolidated by aromatic π–π stacking between the dicarboxylic acid molecules and terminal pyridine rings in [Ni(L)(2)] and short halogen–halogen interactions are also observed. The qualitative prediction of the H-atom position from the C—N—C angles of the terminal pyridine rings in L and the C—O distances in the carboxyl groups show that 1-Cl and 1-Br are co-crystals rather than salts. International Union of Crystallography 2017-01-06 /pmc/articles/PMC5290543/ /pubmed/28217320 http://dx.doi.org/10.1107/S2056989016020326 Text en © Nakanishi and Sato 2017 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/2.0/uk/ |
spellingShingle | Research Communications Nakanishi, Takumi Sato, Osamu Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title | Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title_full | Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title_fullStr | Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title_full_unstemmed | Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title_short | Crystal structures of two nickel compounds comprising neutral Ni(II) hydrazone complexes and dicarboxylic acids |
title_sort | crystal structures of two nickel compounds comprising neutral ni(ii) hydrazone complexes and dicarboxylic acids |
topic | Research Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290543/ https://www.ncbi.nlm.nih.gov/pubmed/28217320 http://dx.doi.org/10.1107/S2056989016020326 |
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