TY  - JOUR
AU  - Warzajtis, Beata
AU  - Rychlewska, Urszula
AU  - Radanović, Dušanka
AU  - Stanojević, Ivana M.
AU  - Draskovic, Nenad S.
AU  - Radulovic, Niko S.
AU  - Đuran, Miloš
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1525
AB  - A series of Na+, K+ and Ca2+ salts of chromium(III) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N',N'-tetraacetate (1,3-pndta) ligand was evaluated. The extent of distortion exhibited in the geometry of these octahedral complexes was computed and related to the configuration at the metal center and the ligand stereogenic center. The materials have been used to investigate the effect of the counter ion and the diamine ring substitution on the self organization and degree of hydration of these molecules in crystals. Various modes of carboxylate binding to metal atoms have been related to the formation of 3D, 2D and 1D polymeric structures. The electronic absorption and H-1 NMR spectra of 1,3-pndta-Cr(III) complexes are discussed in relation to those of 1,3-pdta-Cr(III) complex (1,3-propanediamine-N,N,N',N'-tetraacetate ion) of known structure.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Polyhedron
T1  - Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand carrying different counter ions. Stereospecific formation and crystal structures of Na[Cr(1,3-pndta)]center dot H2O, K[C
VL  - 67
SP  - 270
EP  - 278
DO  - 10.1016/j.poly.2013.09.009
ER  - 

@article{
author = "Warzajtis, Beata and Rychlewska, Urszula and Radanović, Dušanka and Stanojević, Ivana M. and Draskovic, Nenad S. and Radulovic, Niko S. and Đuran, Miloš",
year = "2014",
abstract = "A series of Na+, K+ and Ca2+ salts of chromium(III) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N',N'-tetraacetate (1,3-pndta) ligand was evaluated. The extent of distortion exhibited in the geometry of these octahedral complexes was computed and related to the configuration at the metal center and the ligand stereogenic center. The materials have been used to investigate the effect of the counter ion and the diamine ring substitution on the self organization and degree of hydration of these molecules in crystals. Various modes of carboxylate binding to metal atoms have been related to the formation of 3D, 2D and 1D polymeric structures. The electronic absorption and H-1 NMR spectra of 1,3-pndta-Cr(III) complexes are discussed in relation to those of 1,3-pdta-Cr(III) complex (1,3-propanediamine-N,N,N',N'-tetraacetate ion) of known structure.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Polyhedron",
title = "Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand carrying different counter ions. Stereospecific formation and crystal structures of Na[Cr(1,3-pndta)]center dot H2O, K[C",
volume = "67",
pages = "270-278",
doi = "10.1016/j.poly.2013.09.009"
}

Warzajtis, B., Rychlewska, U., Radanović, D., Stanojević, I. M., Draskovic, N. S., Radulovic, N. S.,& Đuran, M.. (2014). Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand carrying different counter ions. Stereospecific formation and crystal structures of Na[Cr(1,3-pndta)]center dot H2O, K[C. in Polyhedron
Oxford : Pergamon-Elsevier Science Ltd., 67, 270-278.
https://doi.org/10.1016/j.poly.2013.09.009

Warzajtis B, Rychlewska U, Radanović D, Stanojević IM, Draskovic NS, Radulovic NS, Đuran M. Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand carrying different counter ions. Stereospecific formation and crystal structures of Na[Cr(1,3-pndta)]center dot H2O, K[C. in Polyhedron. 2014;67:270-278.
doi:10.1016/j.poly.2013.09.009 .

Warzajtis, Beata, Rychlewska, Urszula, Radanović, Dušanka, Stanojević, Ivana M., Draskovic, Nenad S., Radulovic, Niko S., Đuran, Miloš, "Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand carrying different counter ions. Stereospecific formation and crystal structures of Na[Cr(1,3-pndta)]center dot H2O, K[C" in Polyhedron, 67 (2014):270-278,
https://doi.org/10.1016/j.poly.2013.09.009 . .

TY  - JOUR
AU  - Draskovic, Nenad S.
AU  - Radanović, Dušanka
AU  - Rychlewska, Urszula
AU  - Warzajtis, Beata
AU  - Stanojević, Ivana M.
AU  - Đuran, Miloš
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1107
AB  - Structural variations modulated by ethyl side group have been analyzed for nickel(II) and copper(II) complexes with (+/-)-1,3-pentanediamine-N,N,N',N'-tetraacetate ligand (1,3-pndta) and its pentadentate derivative (+/-)-1,3-pentanediamine-N,N,N'-triacetate (1,3-pnd3a). X-ray results obtained for the octahedral 1,3-pndta-Ni(II) complex indicate the distinct correlation of the central chirality of the metal with the chirality at the diamine alpha-carbon, which leads to the formation of a racemic mixture of Delta Lambda Delta(R) and Lambda Delta Lambda(S) enantiomeric anionic complexes, where the R and S labels designate the absolute configuration at the ligand (ethyl-substituted) stereogenic center. These stereoisomers are those required to maintain an equatorial ethyl group on the central six-membered chelate ring, whose conformation is lambda twist-boat for the Delta Lambda Delta isomer and 8 twist-boat for the Lambda Delta Lambda isomer. Ethyl group discernibly affects the variation of the Ni-N and Ni-O bond lengths compared to the analogous complex lacking the substitution of one of the diastereotopic diamine CH2 hydrogens and functions as steric bulkiness which hampers an efficient and of high symmetry packing, observed in the crystals of the parent complex. The infrared and electronic absorption spectra of hexadentate Mg[Ni(1,3-pndta)]center dot 10H(2)O (1) and Mg[Cu(1,3-pndta)]center dot 7H(2)O (3), and pentadentate Mg[Ni-2(1,3-pnd3a)(2)]center dot 8H(2)O (2) and MgiCu2(1,3-pnd3a)(2)]center dot 7H(2)O (4) complexes are presented and discussed in comparison with those of the analogous Mg[Ni(1,3-pdta)center dot 8H(2)O (5), Ma[Cu(1,3-pdta)]center dot 8H(2)O (6) and Mg[Cu-2(1,3-pd3a)(2)]center dot 7H(2)O (7) complexes of known crystal structures.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Polyhedron
T1  - Synthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Ni
VL  - 43
IS  - 1
SP  - 185
EP  - 193
DO  - 10.1016/j.poly.2012.06.013
ER  - 

@article{
author = "Draskovic, Nenad S. and Radanović, Dušanka and Rychlewska, Urszula and Warzajtis, Beata and Stanojević, Ivana M. and Đuran, Miloš",
year = "2012",
abstract = "Structural variations modulated by ethyl side group have been analyzed for nickel(II) and copper(II) complexes with (+/-)-1,3-pentanediamine-N,N,N',N'-tetraacetate ligand (1,3-pndta) and its pentadentate derivative (+/-)-1,3-pentanediamine-N,N,N'-triacetate (1,3-pnd3a). X-ray results obtained for the octahedral 1,3-pndta-Ni(II) complex indicate the distinct correlation of the central chirality of the metal with the chirality at the diamine alpha-carbon, which leads to the formation of a racemic mixture of Delta Lambda Delta(R) and Lambda Delta Lambda(S) enantiomeric anionic complexes, where the R and S labels designate the absolute configuration at the ligand (ethyl-substituted) stereogenic center. These stereoisomers are those required to maintain an equatorial ethyl group on the central six-membered chelate ring, whose conformation is lambda twist-boat for the Delta Lambda Delta isomer and 8 twist-boat for the Lambda Delta Lambda isomer. Ethyl group discernibly affects the variation of the Ni-N and Ni-O bond lengths compared to the analogous complex lacking the substitution of one of the diastereotopic diamine CH2 hydrogens and functions as steric bulkiness which hampers an efficient and of high symmetry packing, observed in the crystals of the parent complex. The infrared and electronic absorption spectra of hexadentate Mg[Ni(1,3-pndta)]center dot 10H(2)O (1) and Mg[Cu(1,3-pndta)]center dot 7H(2)O (3), and pentadentate Mg[Ni-2(1,3-pnd3a)(2)]center dot 8H(2)O (2) and MgiCu2(1,3-pnd3a)(2)]center dot 7H(2)O (4) complexes are presented and discussed in comparison with those of the analogous Mg[Ni(1,3-pdta)center dot 8H(2)O (5), Ma[Cu(1,3-pdta)]center dot 8H(2)O (6) and Mg[Cu-2(1,3-pd3a)(2)]center dot 7H(2)O (7) complexes of known crystal structures.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Polyhedron",
title = "Synthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Ni",
volume = "43",
number = "1",
pages = "185-193",
doi = "10.1016/j.poly.2012.06.013"
}

Draskovic, N. S., Radanović, D., Rychlewska, U., Warzajtis, B., Stanojević, I. M.,& Đuran, M.. (2012). Synthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Ni. in Polyhedron
Oxford : Pergamon-Elsevier Science Ltd., 43(1), 185-193.
https://doi.org/10.1016/j.poly.2012.06.013

Draskovic NS, Radanović D, Rychlewska U, Warzajtis B, Stanojević IM, Đuran M. Synthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Ni. in Polyhedron. 2012;43(1):185-193.
doi:10.1016/j.poly.2012.06.013 .

Draskovic, Nenad S., Radanović, Dušanka, Rychlewska, Urszula, Warzajtis, Beata, Stanojević, Ivana M., Đuran, Miloš, "Synthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Ni" in Polyhedron, 43, no. 1 (2012):185-193,
https://doi.org/10.1016/j.poly.2012.06.013 . .

TY  - JOUR
AU  - Rychlewska, Urszula
AU  - Warzajtis, Beata
AU  - Radanović, Dušanka
AU  - Draskovic, Nenad S.
AU  - Stanojević, Ivana M.
AU  - Đuran, Miloš
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/915
AB  - This paper reports the synthesis and X-ray characteristics of the missing homonuclear s-block metal complex {[Sr-2(1,3-pdta)(H2O)(6)]center dot H2O}(n). In the title compound, the hexadentate 1,3-propanediaminetetraacetate (1,3-pdta) ligand joins to two Sr(II) centers via the diamine chain. Moreover, each Sr(II) is bridged through two carboxylate O atoms and a water molecule to two neighboring Sr(II) ions. The coordination sphere around each Sr(II) ion consists of one diamine nitrogen, four carboxylate oxygens and four water molecules. Comparison with the previously reported M(II)-1,3-pdta complexes reveals that increasing of the ion size results in the incorporation of water molecules into its first coordination sphere and consequent increase of the coordination number (C.N.) from six to seven or eight, while keeping the hexadentate coordination mode of the ligand. Further increase of the metal ion size leads to the loss of the chelating properties of the diamine and formation of a bis-tridentate complex. Associated with it is the change in the binding mode of the carboxylate groups. This forms the basis for classification of divalent metal 1,3-pdta complexes into five distinct structural classes. Additionally, in the present study X-ray powder diffraction and IR spectroscopy were used to distinguish the different structural types of M(II)-1,3-pdta complexes, including Ba[Ba(1,3-pdta)]center dot 2H(2)O which has been used for their preparation.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Polyhedron
T1  - Structural diversification of the coordination mode of divalent metals with 1,3-propanediaminetetraacetate (1,3-pdta): The missing crystal structure of the s-block metal complex [Sr-2(1,3-pdta)(H2O)(6)]center dot H2O
VL  - 30
IS  - 6
SP  - 983
EP  - 989
DO  - 10.1016/j.poly.2010.12.045
ER  - 

@article{
author = "Rychlewska, Urszula and Warzajtis, Beata and Radanović, Dušanka and Draskovic, Nenad S. and Stanojević, Ivana M. and Đuran, Miloš",
year = "2011",
abstract = "This paper reports the synthesis and X-ray characteristics of the missing homonuclear s-block metal complex {[Sr-2(1,3-pdta)(H2O)(6)]center dot H2O}(n). In the title compound, the hexadentate 1,3-propanediaminetetraacetate (1,3-pdta) ligand joins to two Sr(II) centers via the diamine chain. Moreover, each Sr(II) is bridged through two carboxylate O atoms and a water molecule to two neighboring Sr(II) ions. The coordination sphere around each Sr(II) ion consists of one diamine nitrogen, four carboxylate oxygens and four water molecules. Comparison with the previously reported M(II)-1,3-pdta complexes reveals that increasing of the ion size results in the incorporation of water molecules into its first coordination sphere and consequent increase of the coordination number (C.N.) from six to seven or eight, while keeping the hexadentate coordination mode of the ligand. Further increase of the metal ion size leads to the loss of the chelating properties of the diamine and formation of a bis-tridentate complex. Associated with it is the change in the binding mode of the carboxylate groups. This forms the basis for classification of divalent metal 1,3-pdta complexes into five distinct structural classes. Additionally, in the present study X-ray powder diffraction and IR spectroscopy were used to distinguish the different structural types of M(II)-1,3-pdta complexes, including Ba[Ba(1,3-pdta)]center dot 2H(2)O which has been used for their preparation.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Polyhedron",
title = "Structural diversification of the coordination mode of divalent metals with 1,3-propanediaminetetraacetate (1,3-pdta): The missing crystal structure of the s-block metal complex [Sr-2(1,3-pdta)(H2O)(6)]center dot H2O",
volume = "30",
number = "6",
pages = "983-989",
doi = "10.1016/j.poly.2010.12.045"
}

Rychlewska, U., Warzajtis, B., Radanović, D., Draskovic, N. S., Stanojević, I. M.,& Đuran, M.. (2011). Structural diversification of the coordination mode of divalent metals with 1,3-propanediaminetetraacetate (1,3-pdta): The missing crystal structure of the s-block metal complex [Sr-2(1,3-pdta)(H2O)(6)]center dot H2O. in Polyhedron
Oxford : Pergamon-Elsevier Science Ltd., 30(6), 983-989.
https://doi.org/10.1016/j.poly.2010.12.045

Rychlewska U, Warzajtis B, Radanović D, Draskovic NS, Stanojević IM, Đuran M. Structural diversification of the coordination mode of divalent metals with 1,3-propanediaminetetraacetate (1,3-pdta): The missing crystal structure of the s-block metal complex [Sr-2(1,3-pdta)(H2O)(6)]center dot H2O. in Polyhedron. 2011;30(6):983-989.
doi:10.1016/j.poly.2010.12.045 .

Rychlewska, Urszula, Warzajtis, Beata, Radanović, Dušanka, Draskovic, Nenad S., Stanojević, Ivana M., Đuran, Miloš, "Structural diversification of the coordination mode of divalent metals with 1,3-propanediaminetetraacetate (1,3-pdta): The missing crystal structure of the s-block metal complex [Sr-2(1,3-pdta)(H2O)(6)]center dot H2O" in Polyhedron, 30, no. 6 (2011):983-989,
https://doi.org/10.1016/j.poly.2010.12.045 . .