Compartmental ligands: Synthesis and characterization of polynuclear uranyl complexes

Paolucci, Gino; Stelluto, S.; Sitran, S.

doi:10.1016/s0020-1693(00)81346-8

Cited by 24 publications

(14 citation statements)

References 4 publications

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“…The 1 H NMR spectrum of BMSHCPH 4 in DMSOd 6 shows only one set of signals indicating the two pendant arms of the pyridine moiety are magnetically equivalent on the corresponding nmr time scale. Two broad singlets at 10.66 and 12.41 ppm are assigned to two NH and two OH protons, respectively [2], and are exchanged by D 2 O. The presence of these signals in the downfield region in comparison with aromatic protons was due to the involvement of both the phenolic oxygens and amide nitrogens in intramolecular hydrogen bonding which was confirmed by the crystal structure.…”

Section: H Nmr Spectrasupporting

confidence: 52%

“…Polynuclear uranyl complexes of bissalicylaldehyde-2,6-dipicolinoyl-hydrazone have been reported by Paolucci et al [2]. Chen et al [3] have reported a series of trinuclear copper(II) complexes of 2,6-bis[ [5-substituted salicylidine]hydrazinocarbonyl] pyridine and also reported the crystal structure of copper(II) complex of the bissalicylaldehyde-2,6-dipicolinoyl-hydrazone [2].…”

Section: Introductionmentioning

confidence: 95%

“…2,6-bis[(3-methoxysalicylidene)hydrazinocarbonyl]pyridine (BMSHCPH 4 ) was synthesized by the literature method [2] with a slight modification. To a hot suspension of (6) (1.95 g, 10 mmol) in absolute ethanol (20 cm 3 ), a solution of 3-methoxy salicylaldehyde (7) (3.04 g, 20 mmol) in the same solvent (20 cm 3 ) was added, and refluxed for 4 h. The yellow microcrystalline product (BMSHCPH 4 ) obtained was filtered, washed with hot water followed by hot ethanol, air dried and recrystallized from 2-ethoxyethanol to get crystals suitable for X-ray diffraction studies.…”

Section: Measurementsmentioning

confidence: 99%

“…The presence of these signals in the downfield region in comparison with aromatic protons was due to the involvement of both the phenolic oxygens and amide nitrogens in intramolecular hydrogen bonding which was confirmed by the crystal structure. A sharp singlet at 8.97 ppm was ascribed to two azomethine protons [H7 and H7 ] [2]. A multiplet at 8.…”

Section: H Nmr Spectramentioning

confidence: 99%

“…Chen et al [3] have reported a series of trinuclear copper(II) complexes of 2,6-bis[ [5-substituted salicylidine]hydrazinocarbonyl] pyridine and also reported the crystal structure of copper(II) complex of the bissalicylaldehyde-2,6-dipicolinoyl-hydrazone [2]. The crystal structure of the complex reveals the tricompartmental nature of the ligand.…”

Section: Introductionmentioning

confidence: 99%

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Crystal structure of nonadentate tricompartmental ligand derived from pyridine-2,6-dicarboxylic acid: Spectroscopic, electrochemical and thermal investigations of its transition metal(II) complexes

Vadavi

Shenoy

Badiger

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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a b s t r a c tThe coordinating behavior of a new dihydrazone ligand, 2,6-bis [(3-methoxysalicylidene) hydrazinocarbonyl]pyridine towards manganese(II), cobalt(II), nickel(II), copper(II), zinc(II) and cadmium(II) has been described. The metal complexes were characterized by magnetic moments, conductivity measurements, spectral (IR, NMR, UV-Vis, FAB-Mass and EPR) and thermal studies. The ligand crystallizes in triclinic system, space group P-1, with˛= 98.491(10)• ,ˇ= 110.820(10)• and = 92.228(10)• . The cell dimensions are a = 10.196(7)Å, b = 10.814(7)Å, c = 10.017(7)Å, Z = 2 and V = 1117.4(12). IR spectral studies reveal the nonadentate behavior of the ligand. All the complexes are neutral in nature and possess six-coordinate geometry around each metal center. The X-band EPR spectra of copper(II) complex at both room temperature and liquid nitrogen temperature showed unresolved broad signals with g iso = 2.106. Cyclic voltametric studies of copper(II) complex at different scan rates reveal that all the reaction occurring are irreversible.

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Section: H Nmr Spectrasupporting

confidence: 52%

Section: Introductionmentioning

confidence: 95%

Section: Measurementsmentioning

confidence: 99%

Section: H Nmr Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Crystal structure of nonadentate tricompartmental ligand derived from pyridine-2,6-dicarboxylic acid: Spectroscopic, electrochemical and thermal investigations of its transition metal(II) complexes

Vadavi

Shenoy

Badiger

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Study on Syntheses and Anti‐bacterial Activities of Some New Transition Metal Complexes with Schiff Base Ligand Containing Pyridine and Amide Moieties

Zhu

et al. 2004

Chin. J. Chem.

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Three Copper(II) Complexes of a “Tritopic” Hydrazone Ligand: Synthesis and Structural Characterization

Qin

Nie

Weng

et al. 2011

Zeitschrift anorg allge chemie

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Three copper(II) complexes with the ligand bis[(2‐pyridyl)methylene]pyridine‐2,6‐dicarbohydrazone (H2L), {[Cu3(L)(ClO4)3(C2H5OH)2(H2O)]·(ClO4)·(H2O)}n (1), {[Cu3(L)(SO4)2(H2O)3]·4H2O}n(2), and [Cu6(L)2(CH3COO)6(OH)2]·2H2O (3), were synthesized and structurally characterized. In each compound, the L2– ligand coordinates to three copper ions to produce a trinuclear copper subunit. The trinuclear copper subunits in compound 1 are connected by the bridging of ClO4– groups to build a 1D triple‐chain structure, and those in compound 2 are linked into 1D chain structure by the bridging of SO42– groups. Compound 3 presents a hexanuclear copper cluster formed by two trinuclear copper units linked by two μ3‐OH bridges.

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Compartmental ligands: Synthesis and characterization of polynuclear uranyl complexes

Cited by 24 publications

References 4 publications

Crystal structure of nonadentate tricompartmental ligand derived from pyridine-2,6-dicarboxylic acid: Spectroscopic, electrochemical and thermal investigations of its transition metal(II) complexes

Crystal structure of nonadentate tricompartmental ligand derived from pyridine-2,6-dicarboxylic acid: Spectroscopic, electrochemical and thermal investigations of its transition metal(II) complexes

Study on Syntheses and Anti‐bacterial Activities of Some New Transition Metal Complexes with Schiff Base Ligand Containing Pyridine and Amide Moieties

Three Copper(II) Complexes of a “Tritopic” Hydrazone Ligand: Synthesis and Structural Characterization

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