Some hexadentate Ni(II)-edta-type complexes containing five-membered diamine rings. The molecular and crystal structure of the trans(O5) isomer of barium(ethylenediamine)-N,N′-diacetato-N,N′-di-3-propionato_)nicklate(II) hexahydrate, trans(O5)-Ba[Ni(eddadp)]·6H2O, and strain analysis of edta-type chelates in relation to their octahedral distortion

Radanović, Dušan J.; Ianelli, S.; Pelosi, Giorgio; Matović, Zoran D.; Tasić-Stojanović, Sladjana; Douglas, Bodie E.

doi:10.1016/s0020-1693(98)00009-7

Cited by 31 publications

(20 citation statements)

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“…9,10 The sixmembered carboxylate rings of ethylenediamine-N,N′-diacetato-N,N′-dipropionato ion ([eddadp] 4− ) serve better for the formation of less-strained G rings favoring the trans(O 5 ) isomer of [M(eddadp)] n− complexes when M = Co III , 23,24 Cr III , 25,26 and Rh III or Ni II . 11,27,28 It is worth noting that, for Co III and Rh III , the less stable trans(O 5 O 6 ) isomer is also found and characterized. The optically active S,S-edds ligand (S,S-ethylenediamine-N,N′disuccinate ion) produces only the trans(O 5 ) isomer but does so stereospecifically with the Λ configuration.…”

Section: ■ Introductionmentioning

confidence: 98%

Synthetic, Crystallographic, and Computational Study of Copper(II) Complexes of Ethylenediaminetetracarboxylate Ligands

et al. 2013

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Copper(II) complexes of hexadentate ethylenediaminetetracarboxylic acid type ligands H(4)eda3p and H(4)eddadp (H(4)eda3p = ethylenediamine-N-acetic-N,N',N'-tri-3-propionic acid; H(4)eddadp = ethylenediamine-N,N'-diacetic-N,N'-di-3-propionic acid) have been prepared. An octahedral trans(O(6)) geometry (two propionate ligands coordinated in axial positions) has been established crystallographically for the Ba[Cu(eda3p)]·8H(2)O compound, while Ba[Cu(eddadp)]·8H(2)O is proposed to adopt a trans(O(5)) geometry (two axial acetates) on the basis of density functional theory calculations and comparisons of IR and UV-vis spectral data. Experimental and computed structural data correlating similar copper(II) chelate complexes have been used to better understand the isomerism and departure from regular octahedral geometry within the series. The in-plane O-Cu-N chelate angles show the smallest deviation from the ideal octahedral value of 90°, and hence the lowest strain, for the eddadp complex with two equatorial β-propionate rings. A linear dependence between tetragonality and the number of five-membered rings has been established. A natural bonding orbital analysis of the series of complexes is also presented.

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Section: ■ Introductionmentioning

confidence: 98%

Synthetic, Crystallographic, and Computational Study of Copper(II) Complexes of Ethylenediaminetetracarboxylate Ligands

et al. 2013

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“…This result discards the formation of Ni or Mo interaction with the free pair of electrons of C=N from the organic additive. In addition, this result is related to the low ability complex for some organic additives with a larger size and some metals [ 32 ]. However, the OH groups of the organic additive contribute to the formation of new Al-O-C [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of 2,6-Bis-(1-hydroxy-1,1-diphenyl-methyl) Pyridine as Organic Additive in Sulfide NiMoP/γ-Al2O3 Catalyst for Hydrodesulfurization of Straight-Run Gas Oil

et al. 2017

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The effect of 2,6-bis-(1-hydroxy-1,1-diphenyl-methyl) pyridine (BDPHP) in the preparation of NiMoP/γ-Al2O3 catalysts have been investigated in the hydrodesulfurization (HDS) of straight-run gas oil. The γ-Al2O3 support was modified by surface impregnation of a solution of BDPHP to afford BDPHP/Ni molar ratios (0.5 and 1.0) in the final composition. The highest activity for NiMoP materials was found when the molar ratio of BDPHP/Ni was of 0.5. X-ray diffraction (XRD) results revealed that NiMoP (0.5) showed better dispersion of MoO3 than the NiMoP (1.0). Fourier transform infrared spectroscopy (FT-IR) results indicated that the organic additive interacts with the γ-Al2O3 surface and therefore discards the presence of Mo or Ni complexes. Raman spectroscopy suggested a high Raman ratio for the NiMoP (0.5) sample. The increment of the Mo=O species is related to a major availability of Mo species in the formation of MoS2. The temperature programmed reduction (TPR) results showed that the NiMoP (0.5) displayed moderate metal–support interaction. Likewise, X-ray photoelectron spectroscopy (XPS) exhibited higher sulfurization degree for NiMoP (0.5) compared with NiMoP (1.0). The increment of the MoO3 dispersion, the moderate metal–support interaction, the increase of sulfurization degree and the increment of Mo=O species provoked by the BDPHP incorporation resulted in a higher gas oil HDS activity.

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“…The obtained results have been compared with experimental data to enhance the coordination nature of the nickel(II) edta-type complexes. The Ni(II) complexes of edta (ethylenediaminetetraacetato anion), eddadp (ethylenediamine-N,N 0 -diacetato-N,N 0 -di-3-propionato anion) and edtp (ethylenediamine-tetra-3-propionato anion) have been already prepared [4,10] and their structure, except Ni-edtp, established. The rest of complexes invoking ed3ap (ethylenediamine-N,N 0 ,N 0 -triacetato-N 0 -3-propionato anion) and eda3p (ethylenediamine-N-acetato-N,N 0 ,N 0 -tri-3-propionato anion) are reported here (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The effects of chelating agents and drugs used clinically as antidotes to metal toxicity were reviewed in several articles [1]. Our group still continue to research in the field of M(III) and M(II) (particularly paying attention to Cu(II) and Ni(II)) complexes of EDTA-type diaminopolycarboxylate ligands in decades long tradition [2][3][4][5][6][7]. In the [M(edta)] nÀ systems the deviation of the bonding angles from the ideal values in [M = Co(III), Cu(II), Ni(II)] and other ethylenediaminetetra acetate (edta) metal complexes shows significance of the ligand strain.…”

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confidence: 99%

Nickel(II) complexes of whole set of the simple ethylenediaminetetracarboxylate ligands: DFT study of complexes invoking molecular orbital and configurational analysis

Miletić

Meetsma

Koningsbruggen

et al. 2009

Inorganic Chemistry Communications

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Cited by 31 publications

References 40 publications

Synthetic, Crystallographic, and Computational Study of Copper(II) Complexes of Ethylenediaminetetracarboxylate Ligands

Synthetic, Crystallographic, and Computational Study of Copper(II) Complexes of Ethylenediaminetetracarboxylate Ligands

Effect of 2,6-Bis-(1-hydroxy-1,1-diphenyl-methyl) Pyridine as Organic Additive in Sulfide NiMoP/γ-Al2O3 Catalyst for Hydrodesulfurization of Straight-Run Gas Oil

Nickel(II) complexes of whole set of the simple ethylenediaminetetracarboxylate ligands: DFT study of complexes invoking molecular orbital and configurational analysis

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