TY  - JOUR
AU  - Vojinovic, LS
AU  - Leovac, Vukadin M.
AU  - Novaković, Slađana B.
AU  - Bogdanović, Goran A.
AU  - Csanadi, JJ
AU  - Češljević, Valerija I.
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2835
AB  - A new ligand, pyridoxilidene Girard-T hydrazone, [H3L]Cl-2 . 2H(2)O, and its octahedral cobalt(III) complexes [Co(HL) (NO2)(3)] . H2O (1) and [Co(HL)(2)](PF6)(3) (2) were synthesized. The X-ray analysis of (1) showed that the complex has a mer-octahedral configuration formed by coordination of the tridentate ONO neutral Schiff-base molecule and three monodentate N-bonded NO2 groups. Hydrogen bonds and intermolecular interactions for this complex are discussed. Complex (2) also has a mer-octahedral configuration. The ligand and complexes were characterized by elemental analysis, conductometric and magnetochemical measurements, IR and UV-Visible, H-1 and C-13 NMR spectra. (C) 2004 Published by Elsevier B.V.
T2  - Inorganic Chemistry Communications
T1  - Transition metal complexes with Girard reagent-based ligands, Part I: Synthesis and crystal structure of the first cobalt(III) complexes with Schiff base derivative of Girard reagent
VL  - 7
IS  - 12
SP  - 1264
EP  - 1268
DO  - 10.1016/j.inoche.2004.09.016
ER  - 

@article{
author = "Vojinovic, LS and Leovac, Vukadin M. and Novaković, Slađana B. and Bogdanović, Goran A. and Csanadi, JJ and Češljević, Valerija I.",
year = "2004",
abstract = "A new ligand, pyridoxilidene Girard-T hydrazone, [H3L]Cl-2 . 2H(2)O, and its octahedral cobalt(III) complexes [Co(HL) (NO2)(3)] . H2O (1) and [Co(HL)(2)](PF6)(3) (2) were synthesized. The X-ray analysis of (1) showed that the complex has a mer-octahedral configuration formed by coordination of the tridentate ONO neutral Schiff-base molecule and three monodentate N-bonded NO2 groups. Hydrogen bonds and intermolecular interactions for this complex are discussed. Complex (2) also has a mer-octahedral configuration. The ligand and complexes were characterized by elemental analysis, conductometric and magnetochemical measurements, IR and UV-Visible, H-1 and C-13 NMR spectra. (C) 2004 Published by Elsevier B.V.",
journal = "Inorganic Chemistry Communications",
title = "Transition metal complexes with Girard reagent-based ligands, Part I: Synthesis and crystal structure of the first cobalt(III) complexes with Schiff base derivative of Girard reagent",
volume = "7",
number = "12",
pages = "1264-1268",
doi = "10.1016/j.inoche.2004.09.016"
}

Vojinovic, L., Leovac, V. M., Novaković, S. B., Bogdanović, G. A., Csanadi, J.,& Češljević, V. I.. (2004). Transition metal complexes with Girard reagent-based ligands, Part I: Synthesis and crystal structure of the first cobalt(III) complexes with Schiff base derivative of Girard reagent. in Inorganic Chemistry Communications, 7(12), 1264-1268.
https://doi.org/10.1016/j.inoche.2004.09.016

Vojinovic L, Leovac VM, Novaković SB, Bogdanović GA, Csanadi J, Češljević VI. Transition metal complexes with Girard reagent-based ligands, Part I: Synthesis and crystal structure of the first cobalt(III) complexes with Schiff base derivative of Girard reagent. in Inorganic Chemistry Communications. 2004;7(12):1264-1268.
doi:10.1016/j.inoche.2004.09.016 .

Vojinovic, LS, Leovac, Vukadin M., Novaković, Slađana B., Bogdanović, Goran A., Csanadi, JJ, Češljević, Valerija I., "Transition metal complexes with Girard reagent-based ligands, Part I: Synthesis and crystal structure of the first cobalt(III) complexes with Schiff base derivative of Girard reagent" in Inorganic Chemistry Communications, 7, no. 12 (2004):1264-1268,
https://doi.org/10.1016/j.inoche.2004.09.016 . .

TY  - JOUR
AU  - Szecsenyi, KM
AU  - Leovac, Vukadin M.
AU  - Češljević, Valerija I.
AU  - Kovacs, A
AU  - Pokol, G
AU  - Argay, G
AU  - Kalman, A
AU  - Bogdanović, Goran A.
AU  - Jacimovic, ZK
AU  - Spasojević-de Bire, Anne
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2672
AB  - Complex formation of copper(II) bromide and acetate with 1-carboxamide-3,5-dimethylpyrazole (HL3) and copper(II) bromide with 5-amino-4-carboxamide-1-phenylpyrazole (L-2), 4-acetyl-3-amino-5-methylpyrazole (HL4) and 1-carboxamidine-3,5-dimethylpyrazole (HL5), was studied. The obtained compounds, CuBr2(L-2)(2), Cu(L-3)(2), CuBr2(HL4)(2), CuBr2(HL5)(2) and [CuBr(HL1)(L-3)](2) (HL1 denotes the 3,5-dimethylpyrazole), are characterized by elemental analysis, FT-IR spectrometry, molar conductivity, TG-MS and DSC. The X-ray structure of [CuBr(HL1)(L-3)](2) and Cu(L-3)(2) is discussed. For [CuBr(HL1)(L-3)](2) a dimeric penta-co-ordinated structure has been found; the co-ordination around the metal in Cu(L-3)(2) is trans-square planar. To CuBr2(L-2)(2) and CuBr2(HL4)(2) a nearly tetrahedral, while for CuBr2(HL5)(2) an octahedral geometry may be assumed. It means that the geometry of the compounds in the first place depends on the ligand substituents. The course of the complex formation reaction is anion-dependent and may be explained on the basis of Pearsons theory, taking into account the steric factors. A low stability intermediate formation was observed in the thermal decomposition of Cu(L-3)(2). (C) 2003 Elsevier B.V. All rights reserved.
T2  - Inorganica Chimica Acta
T1  - Reaction of copper(II) with 1-carboxamide-3,5-dimethylpyrazole, 1-carboxamidine-3,5-dimethylpyrazole, 4-acetyl-3-amino-5-methylpyrazole and 5-amino-4-carboxamide-1-phenylpyrazole
VL  - 353
SP  - 253
EP  - 262
DO  - 10.1016/S0020-1693(03)00231-7
ER  - 

@article{
author = "Szecsenyi, KM and Leovac, Vukadin M. and Češljević, Valerija I. and Kovacs, A and Pokol, G and Argay, G and Kalman, A and Bogdanović, Goran A. and Jacimovic, ZK and Spasojević-de Bire, Anne",
year = "2003",
abstract = "Complex formation of copper(II) bromide and acetate with 1-carboxamide-3,5-dimethylpyrazole (HL3) and copper(II) bromide with 5-amino-4-carboxamide-1-phenylpyrazole (L-2), 4-acetyl-3-amino-5-methylpyrazole (HL4) and 1-carboxamidine-3,5-dimethylpyrazole (HL5), was studied. The obtained compounds, CuBr2(L-2)(2), Cu(L-3)(2), CuBr2(HL4)(2), CuBr2(HL5)(2) and [CuBr(HL1)(L-3)](2) (HL1 denotes the 3,5-dimethylpyrazole), are characterized by elemental analysis, FT-IR spectrometry, molar conductivity, TG-MS and DSC. The X-ray structure of [CuBr(HL1)(L-3)](2) and Cu(L-3)(2) is discussed. For [CuBr(HL1)(L-3)](2) a dimeric penta-co-ordinated structure has been found; the co-ordination around the metal in Cu(L-3)(2) is trans-square planar. To CuBr2(L-2)(2) and CuBr2(HL4)(2) a nearly tetrahedral, while for CuBr2(HL5)(2) an octahedral geometry may be assumed. It means that the geometry of the compounds in the first place depends on the ligand substituents. The course of the complex formation reaction is anion-dependent and may be explained on the basis of Pearsons theory, taking into account the steric factors. A low stability intermediate formation was observed in the thermal decomposition of Cu(L-3)(2). (C) 2003 Elsevier B.V. All rights reserved.",
journal = "Inorganica Chimica Acta",
title = "Reaction of copper(II) with 1-carboxamide-3,5-dimethylpyrazole, 1-carboxamidine-3,5-dimethylpyrazole, 4-acetyl-3-amino-5-methylpyrazole and 5-amino-4-carboxamide-1-phenylpyrazole",
volume = "353",
pages = "253-262",
doi = "10.1016/S0020-1693(03)00231-7"
}

Szecsenyi, K., Leovac, V. M., Češljević, V. I., Kovacs, A., Pokol, G., Argay, G., Kalman, A., Bogdanović, G. A., Jacimovic, Z.,& Spasojević-de Bire, A.. (2003). Reaction of copper(II) with 1-carboxamide-3,5-dimethylpyrazole, 1-carboxamidine-3,5-dimethylpyrazole, 4-acetyl-3-amino-5-methylpyrazole and 5-amino-4-carboxamide-1-phenylpyrazole. in Inorganica Chimica Acta, 353, 253-262.
https://doi.org/10.1016/S0020-1693(03)00231-7

Szecsenyi K, Leovac VM, Češljević VI, Kovacs A, Pokol G, Argay G, Kalman A, Bogdanović GA, Jacimovic Z, Spasojević-de Bire A. Reaction of copper(II) with 1-carboxamide-3,5-dimethylpyrazole, 1-carboxamidine-3,5-dimethylpyrazole, 4-acetyl-3-amino-5-methylpyrazole and 5-amino-4-carboxamide-1-phenylpyrazole. in Inorganica Chimica Acta. 2003;353:253-262.
doi:10.1016/S0020-1693(03)00231-7 .

Szecsenyi, KM, Leovac, Vukadin M., Češljević, Valerija I., Kovacs, A, Pokol, G, Argay, G, Kalman, A, Bogdanović, Goran A., Jacimovic, ZK, Spasojević-de Bire, Anne, "Reaction of copper(II) with 1-carboxamide-3,5-dimethylpyrazole, 1-carboxamidine-3,5-dimethylpyrazole, 4-acetyl-3-amino-5-methylpyrazole and 5-amino-4-carboxamide-1-phenylpyrazole" in Inorganica Chimica Acta, 353 (2003):253-262,
https://doi.org/10.1016/S0020-1693(03)00231-7 . .

TY  - JOUR
AU  - Bogdanović, Goran A.
AU  - Leovac, Vukadin M.
AU  - Novaković, Slađana B.
AU  - Češljević, Valerija I.
AU  - Spasojević-de Bire, Anne
PY  - 2001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2467
T2  - Acta Crystallographica. Section C: Crystal Structure Communications
T1  - Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N-1,N-4)bis(pyrazole-N-2)nickel(II) diiodide
VL  - 57
SP  - 1138
EP  - 1140
DO  - 10.1107/S010827010100991X
ER  - 

@article{
author = "Bogdanović, Goran A. and Leovac, Vukadin M. and Novaković, Slađana B. and Češljević, Valerija I. and Spasojević-de Bire, Anne",
year = "2001",
journal = "Acta Crystallographica. Section C: Crystal Structure Communications",
title = "Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N-1,N-4)bis(pyrazole-N-2)nickel(II) diiodide",
volume = "57",
pages = "1138-1140",
doi = "10.1107/S010827010100991X"
}

Bogdanović, G. A., Leovac, V. M., Novaković, S. B., Češljević, V. I.,& Spasojević-de Bire, A.. (2001). Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N-1,N-4)bis(pyrazole-N-2)nickel(II) diiodide. in Acta Crystallographica. Section C: Crystal Structure Communications, 57, 1138-1140.
https://doi.org/10.1107/S010827010100991X

Bogdanović GA, Leovac VM, Novaković SB, Češljević VI, Spasojević-de Bire A. Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N-1,N-4)bis(pyrazole-N-2)nickel(II) diiodide. in Acta Crystallographica. Section C: Crystal Structure Communications. 2001;57:1138-1140.
doi:10.1107/S010827010100991X .

Bogdanović, Goran A., Leovac, Vukadin M., Novaković, Slađana B., Češljević, Valerija I., Spasojević-de Bire, Anne, "Transition metal complexes with thiosemicarbazide-based ligands. XLII. Bis(S-methylisothiosemicarbazido-N-1,N-4)bis(pyrazole-N-2)nickel(II) diiodide" in Acta Crystallographica. Section C: Crystal Structure Communications, 57 (2001):1138-1140,
https://doi.org/10.1107/S010827010100991X . .

TY  - JOUR
AU  - Tomić, Zoran D.
AU  - Jacimovic, ZK
AU  - Leovac, Vukadin M.
AU  - Češljević, Valerija I.
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2360
AB  - The title compound, bis(mu-4-acetyl-3-amino-5-methylpyrazolato-N-1 :N-2)bis[(acetato-O)(4-acetyl-3-amino-5-methylpyrazole-N-2)zinc(II)], [Zn-2(C6H8N3O)(2)(C2H3O2)(2)(C6H9N3O)(2)], exists as a centrosymmetric binuclear molecule with two tetrahedrally coordinated Zn atoms bridged by two pyrazolate anions. The geometry of the terminal and bridging pyrazole ligands are slightly different as a consequence of their differing modes of coordination.
T2  - Acta Crystallographica. Section C: Crystal Structure Communications
T1  - Transition metal complexes with pyrazole-derived ligands. XI. [Zn(mu-L)(HL)(OAc)](2) (HL is 4-acetyl-3-amino-5-methylpyrazole)
VL  - 56
SP  - 777
EP  - 779
DO  - 10.1107/S0108270100004881
ER  - 

@article{
author = "Tomić, Zoran D. and Jacimovic, ZK and Leovac, Vukadin M. and Češljević, Valerija I.",
year = "2000",
abstract = "The title compound, bis(mu-4-acetyl-3-amino-5-methylpyrazolato-N-1 :N-2)bis[(acetato-O)(4-acetyl-3-amino-5-methylpyrazole-N-2)zinc(II)], [Zn-2(C6H8N3O)(2)(C2H3O2)(2)(C6H9N3O)(2)], exists as a centrosymmetric binuclear molecule with two tetrahedrally coordinated Zn atoms bridged by two pyrazolate anions. The geometry of the terminal and bridging pyrazole ligands are slightly different as a consequence of their differing modes of coordination.",
journal = "Acta Crystallographica. Section C: Crystal Structure Communications",
title = "Transition metal complexes with pyrazole-derived ligands. XI. [Zn(mu-L)(HL)(OAc)](2) (HL is 4-acetyl-3-amino-5-methylpyrazole)",
volume = "56",
pages = "777-779",
doi = "10.1107/S0108270100004881"
}

Tomić, Z. D., Jacimovic, Z., Leovac, V. M.,& Češljević, V. I.. (2000). Transition metal complexes with pyrazole-derived ligands. XI. [Zn(mu-L)(HL)(OAc)](2) (HL is 4-acetyl-3-amino-5-methylpyrazole). in Acta Crystallographica. Section C: Crystal Structure Communications, 56, 777-779.
https://doi.org/10.1107/S0108270100004881

Tomić ZD, Jacimovic Z, Leovac VM, Češljević VI. Transition metal complexes with pyrazole-derived ligands. XI. [Zn(mu-L)(HL)(OAc)](2) (HL is 4-acetyl-3-amino-5-methylpyrazole). in Acta Crystallographica. Section C: Crystal Structure Communications. 2000;56:777-779.
doi:10.1107/S0108270100004881 .

Tomić, Zoran D., Jacimovic, ZK, Leovac, Vukadin M., Češljević, Valerija I., "Transition metal complexes with pyrazole-derived ligands. XI. [Zn(mu-L)(HL)(OAc)](2) (HL is 4-acetyl-3-amino-5-methylpyrazole)" in Acta Crystallographica. Section C: Crystal Structure Communications, 56 (2000):777-779,
https://doi.org/10.1107/S0108270100004881 . .

TY  - JOUR
AU  - Leovac, Vukadin M.
AU  - Bogdanović, Goran A.
AU  - Češljević, Valerija I.
AU  - Divjakovic, V
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2370
AB  - The title compound, [diacetylpyridine bis(S-methylisothiosemicarbazonato)]iodonickel(II), [Ni(C13H18N7S2)I], is the first example of a complex involving the N-2 coordination of the isothiosemicarbazide moiety. 2,6-Diacetylpyridine bis(S-methylisothiosemicarbazone), as a potentially pentadentate ligand (N-5), is coordinated as a tetradentate species, whereby one (deprotonated) isothiosemicarbazide moiety is coordinated in the usual way ((NN)-N-1-N-4), but the other (neutral) is bonded via the N-2 atom only, the fourth ligator being the pyridine nitrogen. The difference in coordination mode of the isothiosemicarbazide moiety is reflected in the N-1-N-2 bond lengths of 1.359 (4) and 1.379 (3) Angstrom in the deprotonated and undeprotonated moieties, respectively. The structure contains three fused chelate rings in a 5:5:6 arrangement. The six-membered ring has a non-planar conformation.
T2  - Acta Crystallographica Section C: Structural Chemistry
T1  - Transition metal complexes with thiosemicarbazide-based ligands. XV. A square-pyramidal Ni-II complex with an asymmetric coordination of 2,6-diacetylpyridine bis(S-methylisothiosemicarbazone)
VL  - 56
SP  - 936
EP  - 938
DO  - 10.1107/S0108270100007228
ER  - 

@article{
author = "Leovac, Vukadin M. and Bogdanović, Goran A. and Češljević, Valerija I. and Divjakovic, V",
year = "2000",
abstract = "The title compound, [diacetylpyridine bis(S-methylisothiosemicarbazonato)]iodonickel(II), [Ni(C13H18N7S2)I], is the first example of a complex involving the N-2 coordination of the isothiosemicarbazide moiety. 2,6-Diacetylpyridine bis(S-methylisothiosemicarbazone), as a potentially pentadentate ligand (N-5), is coordinated as a tetradentate species, whereby one (deprotonated) isothiosemicarbazide moiety is coordinated in the usual way ((NN)-N-1-N-4), but the other (neutral) is bonded via the N-2 atom only, the fourth ligator being the pyridine nitrogen. The difference in coordination mode of the isothiosemicarbazide moiety is reflected in the N-1-N-2 bond lengths of 1.359 (4) and 1.379 (3) Angstrom in the deprotonated and undeprotonated moieties, respectively. The structure contains three fused chelate rings in a 5:5:6 arrangement. The six-membered ring has a non-planar conformation.",
journal = "Acta Crystallographica Section C: Structural Chemistry",
title = "Transition metal complexes with thiosemicarbazide-based ligands. XV. A square-pyramidal Ni-II complex with an asymmetric coordination of 2,6-diacetylpyridine bis(S-methylisothiosemicarbazone)",
volume = "56",
pages = "936-938",
doi = "10.1107/S0108270100007228"
}

Leovac, V. M., Bogdanović, G. A., Češljević, V. I.,& Divjakovic, V.. (2000). Transition metal complexes with thiosemicarbazide-based ligands. XV. A square-pyramidal Ni-II complex with an asymmetric coordination of 2,6-diacetylpyridine bis(S-methylisothiosemicarbazone). in Acta Crystallographica Section C: Structural Chemistry, 56, 936-938.
https://doi.org/10.1107/S0108270100007228

Leovac VM, Bogdanović GA, Češljević VI, Divjakovic V. Transition metal complexes with thiosemicarbazide-based ligands. XV. A square-pyramidal Ni-II complex with an asymmetric coordination of 2,6-diacetylpyridine bis(S-methylisothiosemicarbazone). in Acta Crystallographica Section C: Structural Chemistry. 2000;56:936-938.
doi:10.1107/S0108270100007228 .

Leovac, Vukadin M., Bogdanović, Goran A., Češljević, Valerija I., Divjakovic, V, "Transition metal complexes with thiosemicarbazide-based ligands. XV. A square-pyramidal Ni-II complex with an asymmetric coordination of 2,6-diacetylpyridine bis(S-methylisothiosemicarbazone)" in Acta Crystallographica Section C: Structural Chemistry, 56 (2000):936-938,
https://doi.org/10.1107/S0108270100007228 . .

TY  - JOUR
AU  - Bogdanović, Goran A.
AU  - Spasojević-de Bire, Anne
AU  - Leovac, Vukadin M.
AU  - Češljević, Valerija I.
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2289
AB  - The square-planar title complex of formula [Ni(C12H13N3OS)(C6H5N)] or [Ni(L)(py)] (L is the dianion of the O,N,N-terdentate benzoylacetone S-methylisothio-semicarbazone ligand and py is pyridine) has structural characteristics of the ligand L somewhat different from those reported previously for the square-planar [Ni(HL)(NH3)]I complex, which involves the same ligand in its monoanionic form. The differences are in the different electronic delocalization in the isothiosemicarbazide moiety, and the trans orientation of the S-Me group and the imido N atom. The effect of H-atom repulsion on the orientation of the phenyl ring with respect to the coordination plane of the complex and the effect of the pyridine ring on the crystal packing are also described.
T2  - Acta Crystallographica. Section C: Crystal Structure Communications
T1  - Transition metal complexes with thiosemicarbazide-based ligands. XXXIX. [Benzoylacetone 3-methylisothiosemicarbazonato(2)-O,N-1,N-4](pyridine-N)nickel(II)
VL  - 55
SP  - 1656
EP  - 1658
DO  - 10.1107/S0108270199004746
ER  - 

@article{
author = "Bogdanović, Goran A. and Spasojević-de Bire, Anne and Leovac, Vukadin M. and Češljević, Valerija I.",
year = "1999",
abstract = "The square-planar title complex of formula [Ni(C12H13N3OS)(C6H5N)] or [Ni(L)(py)] (L is the dianion of the O,N,N-terdentate benzoylacetone S-methylisothio-semicarbazone ligand and py is pyridine) has structural characteristics of the ligand L somewhat different from those reported previously for the square-planar [Ni(HL)(NH3)]I complex, which involves the same ligand in its monoanionic form. The differences are in the different electronic delocalization in the isothiosemicarbazide moiety, and the trans orientation of the S-Me group and the imido N atom. The effect of H-atom repulsion on the orientation of the phenyl ring with respect to the coordination plane of the complex and the effect of the pyridine ring on the crystal packing are also described.",
journal = "Acta Crystallographica. Section C: Crystal Structure Communications",
title = "Transition metal complexes with thiosemicarbazide-based ligands. XXXIX. [Benzoylacetone 3-methylisothiosemicarbazonato(2)-O,N-1,N-4](pyridine-N)nickel(II)",
volume = "55",
pages = "1656-1658",
doi = "10.1107/S0108270199004746"
}

Bogdanović, G. A., Spasojević-de Bire, A., Leovac, V. M.,& Češljević, V. I.. (1999). Transition metal complexes with thiosemicarbazide-based ligands. XXXIX. [Benzoylacetone 3-methylisothiosemicarbazonato(2)-O,N-1,N-4](pyridine-N)nickel(II). in Acta Crystallographica. Section C: Crystal Structure Communications, 55, 1656-1658.
https://doi.org/10.1107/S0108270199004746

Bogdanović GA, Spasojević-de Bire A, Leovac VM, Češljević VI. Transition metal complexes with thiosemicarbazide-based ligands. XXXIX. [Benzoylacetone 3-methylisothiosemicarbazonato(2)-O,N-1,N-4](pyridine-N)nickel(II). in Acta Crystallographica. Section C: Crystal Structure Communications. 1999;55:1656-1658.
doi:10.1107/S0108270199004746 .

Bogdanović, Goran A., Spasojević-de Bire, Anne, Leovac, Vukadin M., Češljević, Valerija I., "Transition metal complexes with thiosemicarbazide-based ligands. XXXIX. [Benzoylacetone 3-methylisothiosemicarbazonato(2)-O,N-1,N-4](pyridine-N)nickel(II)" in Acta Crystallographica. Section C: Crystal Structure Communications, 55 (1999):1656-1658,
https://doi.org/10.1107/S0108270199004746 . .