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| Ultima descărcare din IBN: 2018-08-31 15:32 |
 SM ISO690:2012VODĂ, Irina, MAKHLOUFI, Gamall, DRUŢĂ, Vadim, LOZAN, Vasile, SHOVA, Sergiu, BOUROSH, Pavlina, KRAVTSOV, Victor, JANIAK, Christoph. Mixed-ligand coordination compounds based on the rigid 4,4′-bis(1-imidazolyl)biphenyl and pyridinedicarboxylate ligands. In: Inorganica Chimica Acta, 2018, vol. 482, pp. 526-534. ISSN 0020-1693. DOI: https://doi.org/10.1016/j.ica.2018.06.038 |
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  Inorganica Chimica Acta |
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| Volumul 482 / 2018 / ISSN 0020-1693 | |
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| DOI:https://doi.org/10.1016/j.ica.2018.06.038 | |
| Pag. 526-534 | |
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The mixed-ligand binuclear complexes [Co2(BIBP)(2,6-PDC)2(H2O)4] (1), [Ni2(BIBP)(2,6-PDC)2(H2O)4] (2), and the coordination polymers 1D-{[Zn(BIBP)(2,6-PDC)]·4.5H2O}n (3), 2D-[Ni2(BIBP)(2,5-PDC)2(H2O)4]n (4), and 3D-{[Ni2(BIBP)3(2,3-PDC)2]·3.75H2O}n (5) were synthesized in good yields, characterized by IR, thermogravimetry and single X-ray diffraction method (BIBP = 4,4′-bis(1-imidazolyl)biphenyl, 2,6-PDC = 2,6-pyridinedicarboxylate, 2,3-PDC = 2,3-pyridinedicarboxylate, 2,5-PDC = 2,5-pyridinedicarboxylate). Compounds 1 and 2 are binuclear complexes, compound 3 is a 1D polymer, 4 has a 2D laminated structure, and 5 represent a 3D framework. A common motif in the structures, independent of their dimensionality is the bridging action of the neutral BIBP ligand between two metal ions and a metal chelating coordination of the dianionic PDC ligand through the pyridine nitrogen atom and the carboxylate group in 2-position. The comparative single crystal X-ray structure investigations reveal the fine-tuning influence of the carboxylic group positions in the pyridinedicarboxylate (PDC) ligands and the metal nature on the final structure topology and dimensionality. Compounds 1 and 2 are isostructural and represent Co(II) and Ni(II) isomorphs, where the metal ions coordinate two water molecules and the 2,6-PDC ligand in ONO chelate mode, while the bidentate BIBP ligand link the metal ions into a dinuclear complex. In 3 the 2,6-PDC ligand coordinates to the zinc atom in the same ONO chelate mode and two bridging BIBP ligands give a coordination number of five and extend the structure to a 1D polymer with an enantiopure triple-stranded helix motif in a case of spontaneous resolution in the chiral tetragonal space group P4322. In 4 the 2,5-PDC ligand realises its chelate-bridging function and together with the bridging BIBP ligand form 2D layers with the Ni(II) atoms with hcb (honeycomb or 6,3) topology. In 5 the chelate-bridging 2,3-PDC and BIBP ligands form (4,4)-layers which are interlinked by additional BIBP pillars to a 3D network with two-fold interpenetration of symmetry-related networks. |
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| Cuvinte-cheie 4, 4′-Bis(1-imidazolyl)biphenyl Coordination compounds Mixed ligand Pyridine dicarboxylate Topology |
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<identifier identifierType='DOI'>10.1016/j.ica.2018.06.038</identifier>
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<creatorName>Vodă, I.I.</creatorName>
<affiliation>Institutul de Chimie al AŞM, Moldova, Republica</affiliation>
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<creator>
<creatorName>Makhloufi, G.</creatorName>
<affiliation>Heinrich-Heine Universität Düsseldorf , Germania</affiliation>
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<creator>
<creatorName>Druţă, V.I.</creatorName>
<affiliation>Institutul de Chimie al AŞM, Moldova, Republica</affiliation>
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<creator>
<creatorName>Lozan, V.I.</creatorName>
<affiliation>Institutul de Chimie al AŞM, Moldova, Republica</affiliation>
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<creator>
<creatorName>Şova, S.G.</creatorName>
<affiliation>Institutul de Chimie Macromoleculara „Petru Poni“, Iaşi, România</affiliation>
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<creator>
<creatorName>Bouroş, P.N.</creatorName>
<affiliation>Institutul de Fizică Aplicată al AŞM, Moldova, Republica</affiliation>
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<creator>
<creatorName>Kravţov, V.H.</creatorName>
<affiliation>Institutul de Fizică Aplicată al AŞM, Moldova, Republica</affiliation>
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<creator>
<creatorName>Janiak, C.</creatorName>
<affiliation>Heinrich-Heine Universität Düsseldorf , Germania</affiliation>
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<titles>
<title xml:lang='en'>Mixed-ligand coordination compounds based on the rigid 4,4′-bis(1-imidazolyl)biphenyl and pyridinedicarboxylate ligands</title>
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<publisher>Instrumentul Bibliometric National</publisher>
<publicationYear>2018</publicationYear>
<relatedIdentifier relatedIdentifierType='ISSN' relationType='IsPartOf'>0020-1693</relatedIdentifier>
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<subject>4</subject>
<subject>4′-Bis(1-imidazolyl)biphenyl Coordination compounds Mixed ligand Pyridine dicarboxylate Topology</subject>
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<date dateType='Issued'>2018-10-01</date>
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<description xml:lang='en' descriptionType='Abstract'><p>The mixed-ligand binuclear complexes [Co<sub>2</sub>(BIBP)(2,6-PDC)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>] (1), [Ni<sub>2</sub>(BIBP)(2,6-PDC)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>] (2), and the coordination polymers 1D-{[Zn(BIBP)(2,6-PDC)]·4.5H<sub>2</sub>O}<sub>n</sub> (3), 2D-[Ni<sub>2</sub>(BIBP)(2,5-PDC)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>]<sub>n</sub> (4), and 3D-{[Ni<sub>2</sub>(BIBP)<sub>3</sub>(2,3-PDC)<sub>2</sub>]·3.75H<sub>2</sub>O}<sub>n</sub> (5) were synthesized in good yields, characterized by IR, thermogravimetry and single X-ray diffraction method (BIBP = 4,4′-bis(1-imidazolyl)biphenyl, 2,6-PDC = 2,6-pyridinedicarboxylate, 2,3-PDC = 2,3-pyridinedicarboxylate, 2,5-PDC = 2,5-pyridinedicarboxylate). Compounds 1 and 2 are binuclear complexes, compound 3 is a 1D polymer, 4 has a 2D laminated structure, and 5 represent a 3D framework. A common motif in the structures, independent of their dimensionality is the bridging action of the neutral BIBP ligand between two metal ions and a metal chelating coordination of the dianionic PDC ligand through the pyridine nitrogen atom and the carboxylate group in 2-position. The comparative single crystal X-ray structure investigations reveal the fine-tuning influence of the carboxylic group positions in the pyridinedicarboxylate (PDC) ligands and the metal nature on the final structure topology and dimensionality. Compounds 1 and 2 are isostructural and represent Co(II) and Ni(II) isomorphs, where the metal ions coordinate two water molecules and the 2,6-PDC ligand in ONO chelate mode, while the bidentate BIBP ligand link the metal ions into a dinuclear complex. In 3 the 2,6-PDC ligand coordinates to the zinc atom in the same ONO chelate mode and two bridging BIBP ligands give a coordination number of five and extend the structure to a 1D polymer with an enantiopure triple-stranded helix motif in a case of spontaneous resolution in the chiral tetragonal space group P4<sub>3</sub>22. In 4 the 2,5-PDC ligand realises its chelate-bridging function and together with the bridging BIBP ligand form 2D layers with the Ni(II) atoms with hcb (honeycomb or 6,3) topology. In 5 the chelate-bridging 2,3-PDC and BIBP ligands form (4,4)-layers which are interlinked by additional BIBP pillars to a 3D network with two-fold interpenetration of symmetry-related networks.</p></description>
</descriptions>
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