76099 20191126134635.0 doi 10.1016/j.solidstatesciences.2018.01.004 sideral 104567 ART-2018-104567 eng Cernák, J. Syntheses, crystal structures and magnetic properties of complexes based on [Ni(L-L)3]2+ complex cations with dimethylderivatives of 2, 2'-bipyridine and TCNQ 2018 Access copy available to the general public Unrestricted From the aqueous-methanolic systems Ni(NO3)2 – LiTCNQ – 5, 5'-dmbpy and Ni(NO3)2 – LiTCNQ – 4, 4'-dmbpy three novel complexes [Ni(5, 5'-dmbpy)3](TCNQ)2 (1), [Ni(4, 4'-dmbpy)3](TCNQ)2 (2) and [Ni(4, 4'-dmbpy)3]2(TCNQ-TCNQ)(TCNQ)2·0.60H2O (3), were isolated in single crystal form. The new compounds were identified using chemical analyses and IR spectroscopy. Single crystal studies of all samples corroborated their compositions and have shown that their ionic structures contain the complex cations [Ni(5, 5'-dmbpy)]2+ (1) or [Ni(4, 4'-dmbpy)]2+ (2 and 3). The anionic parts of the respective crystal structures 1–3 are formed by TCNQ·- anion-radicals and in 3 also by a s-dimerized dianion (TCNQ-TCNQ)2- with a C-C distance of 1.663(5) Å. The supramolecular structures are governed by weak hydrogen bonding interactions. The variable-temperature (2–300 K) magnetic studies of 1 and 3 confirmed the presence of magnetically active Ni(II) atoms with S = 1 and TCNQ·- anion-radicals with S = 1/2 while the (TCNQ-TCNQ)2- dianion is magnetically silent. The magnetic behavior was described by a complex magnetic model assuming strong antiferromagnetic interactions between some TCNQ·- anion-radicals. info:eu-repo/grantAgreement/EUR/ERDF/ITMS26220120047 info:eu-repo/grantAgreement/EUR/ERDF/ITMS26220220186 info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68200-C2-1-P info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.155 2018 CHEMISTRY, INORGANIC & NUCLEAR 21 / 45 = 0.467 2018 Q2 T2 PHYSICS, CONDENSED MATTER 36 / 68 = 0.529 2018 Q3 T2 CHEMISTRY, PHYSICAL 89 / 148 = 0.601 2018 Q3 T2 0.508 2018 Chemistry (miscellaneous) 2018 Q2 Materials Science (miscellaneous) 2018 Q2 Condensed Matter Physics 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Hegedüs, M. Váhovská, L. Kuchár, J. Šoltésová, D. Cižmár, E. Feher, A. (orcid)0000-0002-0444-996X Falvello, L.R. Universidad de Zaragoza 2010 760 Universidad de Zaragoza Dpto. Química Inorgánica Área Química Inorgánica 77 (2018), 27-36 Solid state sci. SOLID STATE SCIENCES 1293-2558 1821584 http://zaguan.unizar.es/record/76099/files/texto_completo.pdf Postprint 82946 http://zaguan.unizar.es/record/76099/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:76099 articulos driver 2019-11-26-13:43:39 ARTICLE