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https://open.uns.ac.rs/handle/123456789/14676
Nаziv: | Transition metal complexes with thiosemicarbazide-based ligands. Part LIV. Nickel(II) complexes with pyridoxal semi- (PLSC) and thiosemicarbazone (PLTSC). Crystal and molecular structure of [Ni(PLSC)(H2O)3](NO3)2 and [Ni(PLTSC-H)py]NO3 | Аutоri: | Leovac, Vukadin Jovanović, Ljiljana Divjaković, Vladimir Pevec A. Leban I. Armbruster T. |
Dаtum izdаvаnjа: | 2-јан-2007 | Čаsоpis: | Polyhedron | Sažetak: | This paper describes the synthesis of the first Ni(II) complexes with pyridoxal semicarbazone (PLSC), viz. Ni(PLSC)Cl2 · 3.5H2O (1), [Ni(PLSC)(H2O)3](NO3)2 (2), Ni(PLSC)(NCS)2 · 4H2O (3), [Ni(PLSC-2H)NH3] · 1.5H2O (4), as well as two new complexes with pyridoxal thiosemicarbazone (PLTSC), [Ni(PLTSC-H)py]NO3 (5) and [Ni(PLTSC-H)NCS] (6). Complexes 1-3 are paramagnetic and have most probably an octahedral structure, for complex 2 this was proved by X-ray diffraction analysis. In contrast, complexes 4-6 are diamagnetic and have a square-planar structure, and in the case of complex 5 this was also confirmed by X-ray structural analysis. In all cases the Schiff bases are coordinated as tridentate ligands with an ONX (X = O, PLSC; X = S, PLTSC) set of donor atoms. With the complexes involving the neutral form of PLSC and the monoanionic form of PLTSC, the PL moiety is in the form of a zwitterion. In addition to the above-mentioned techniques, all the complexes were characterized by measuring their molar conductivities, UV-Vis and partial IR spectra. © 2006 Elsevier Ltd. All rights reserved. | URI: | https://open.uns.ac.rs/handle/123456789/14676 | ISSN: | 02775387 | DOI: | 10.1016/j.poly.2006.07.031 |
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