Publications
Publications
2011
2.
Vojinović-Ješić, L. S.; Leovac, V. M.; Lalović, M. M.; Češljević, V. I.; Jovanović, L. S.; Rodić, M. V.; Divjaković, V.
In: Journal of the Serbian Chemical Society, vol. 76, no. 6, pp. 865-877, 2011, ISSN: 03525139.
@article{Vojinovic-Jesic_2011_865,
title = {Transition metal complexes with thiosemicarbazide-based ligands. Part 58. Synthesis, spectral and structural characterization of dioxovanadium(V) complexes with salicylaldehyde thiosemicarbazone},
author = {L. S. Vojinović-Ješić and V. M. Leovac and M. M. Lalović and V. I. Češljević and L. S. Jovanović and M. V. Rodić and V. Divjaković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-79959389104&doi=10.2298%2fJSC101217078V&partnerID=40&md5=69d09a18552b75d23f4d72b779085ce0},
doi = {10.2298/JSC101217078V},
issn = {03525139},
year = {2011},
date = {2011-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {76},
number = {6},
pages = {865-877},
publisher = {Serbian Chemical Society},
abstract = {The first two complexes of dioxovanadium(V) with salicylaldehyde thiosemicarbazone (SALTSC), of the coordination formulas [VO2(SALTSC- -H)] H2O (1) and NH4[VO2(SALTSC-2H] (2), were synthesized and characterized by elemental analysis, conductometric measurements, IR and UV-Vis spectroscopy and X-ray analysis. The complexes were obtained in the reaction of an aqueous ammoniacal solution of NH4VO3 and SALTSC. The results of the characterization showed that SALTSC was coordinated in the usual ONS tridentate mode as monoanion in complex 1 and dianion in complex 2. In both complexes, the vanadium atom is in a deformed square-pyramidal environment and is slightly shifted towards the apical oxo-ligand (? 0.52 Å).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The first two complexes of dioxovanadium(V) with salicylaldehyde thiosemicarbazone (SALTSC), of the coordination formulas [VO2(SALTSC- -H)] H2O (1) and NH4[VO2(SALTSC-2H] (2), were synthesized and characterized by elemental analysis, conductometric measurements, IR and UV-Vis spectroscopy and X-ray analysis. The complexes were obtained in the reaction of an aqueous ammoniacal solution of NH4VO3 and SALTSC. The results of the characterization showed that SALTSC was coordinated in the usual ONS tridentate mode as monoanion in complex 1 and dianion in complex 2. In both complexes, the vanadium atom is in a deformed square-pyramidal environment and is slightly shifted towards the apical oxo-ligand (? 0.52 Å).
2009
1.
Leovac, V. M.; Češljević, V. I.; Vojinović-Ješić, L. S.; Divjaković, V.; Jovanović, L. S.; Szécsényi, K. M.; Rodić, M. V.
In: Polyhedron, vol. 28, no. 16, pp. 3570-3576, 2009, ISSN: 02775387.
@article{Leovac20093570,
title = {Transition metal complexes with thiosemicarbazide-based ligands. Part 56. Square-pyramidal complexes of copper(II) with 2-acetylpyridine S-methylisothiosemicarbazone},
author = {V. M. Leovac and V. I. Češljević and L. S. Vojinović-Ješić and V. Divjaković and L. S. Jovanović and K. M. Szécsényi and M. V. Rodić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-70350000879&doi=10.1016%2fj.poly.2009.07.045&partnerID=40&md5=5af832a275e793804c42d45d3b52b698},
doi = {10.1016/j.poly.2009.07.045},
issn = {02775387},
year = {2009},
date = {2009-01-01},
journal = {Polyhedron},
volume = {28},
number = {16},
pages = {3570-3576},
abstract = {The article describes the synthesis and single-crystal X-ray analysis of two sulfato and one thiocyanato copper(II) complex with 2-acetylpyridine S-methylisothiosemicarbazone (HL) of the formulae [Cu(HL)SO4(H2O)]·H2O (1), [Cu2(HL)2(μ-SO4)2] ·2H2O (2) and [Cu(HL)(NCS)(SCN)] (3), as well as the structure of the protonated ligand H2L+I-. Complexes 1 and 2 were obtained from the reaction of aqueous/methanolic CuSO4·5H2O and ethanolic/methanolic H2L+I- solutions, respectively. Complex 3 was synthesized by the reaction of methanolic solutions of Cu(ClO4)2·6H2O, the ligand and NH4SCN, with the addition of triethyl orthoformate. All three complexes have a slightly deformed square-pyramidal structure (τav = 0.15) with the tridentate NNN neutral ligand in the basal plane. In complexes 1 and 3 the apical position is occupied by the oxygen atom of the monodentate SO4 group, or the sulfur atom of the SCN group. Thanks to the hydrogen bonds, complex 3 may be thought of as having a pseudo-dimeric structure. In the authentic centrosymmetric dimer 2, the oxygen atoms of both SO4 groups occupy also the apical position of both coordination polyhedra, as well as an equatorial position. Complexes 1 and 3 have μeff values characteristic of magnetically isolated mononuclear Cu(II) complexes. In contrast to them, complex 2 has a μeff value of 1.57 BM, which is in agreement with its dinuclear structure. All the complexes, in addition to the X-ray analysis and magnetic measurements, were characterized by IR and UV-Vis spectroscopy and by thermal analysis. © 2009 Elsevier Ltd. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The article describes the synthesis and single-crystal X-ray analysis of two sulfato and one thiocyanato copper(II) complex with 2-acetylpyridine S-methylisothiosemicarbazone (HL) of the formulae [Cu(HL)SO4(H2O)]·H2O (1), [Cu2(HL)2(μ-SO4)2] ·2H2O (2) and [Cu(HL)(NCS)(SCN)] (3), as well as the structure of the protonated ligand H2L+I-. Complexes 1 and 2 were obtained from the reaction of aqueous/methanolic CuSO4·5H2O and ethanolic/methanolic H2L+I- solutions, respectively. Complex 3 was synthesized by the reaction of methanolic solutions of Cu(ClO4)2·6H2O, the ligand and NH4SCN, with the addition of triethyl orthoformate. All three complexes have a slightly deformed square-pyramidal structure (τav = 0.15) with the tridentate NNN neutral ligand in the basal plane. In complexes 1 and 3 the apical position is occupied by the oxygen atom of the monodentate SO4 group, or the sulfur atom of the SCN group. Thanks to the hydrogen bonds, complex 3 may be thought of as having a pseudo-dimeric structure. In the authentic centrosymmetric dimer 2, the oxygen atoms of both SO4 groups occupy also the apical position of both coordination polyhedra, as well as an equatorial position. Complexes 1 and 3 have μeff values characteristic of magnetically isolated mononuclear Cu(II) complexes. In contrast to them, complex 2 has a μeff value of 1.57 BM, which is in agreement with its dinuclear structure. All the complexes, in addition to the X-ray analysis and magnetic measurements, were characterized by IR and UV-Vis spectroscopy and by thermal analysis. © 2009 Elsevier Ltd. All rights reserved.