Uranyl nitrate complexes of some Schiff bases of 4-aminoantipyrine and certain carbonyl compounds

Devi, G. Sobhana; Indrasenan, P.

doi:10.1016/s0020-1693(00)84388-1

Cited by 16 publications

(4 citation statements)

References 6 publications

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“…2, we do not observe this peak in the IR spectrum of zinc(II) and cobalt(II) complexes. Devi et al have shown that the number and relative energies of nitrate combination frequencies (n1 þ n4) in the 1700e1800 cm À1 region of the infrared spectrum may be used as an aid to distinguish the various coordination modes of the nitrate groups [24]. According to Agarwal et al bidentate coordination involves a greater distortion from D 3h symmetry than monodentate coordination; therefore, bidentate complexes should show a larger separation of (n 1 þ n 4 ) [25].…”

Section: Characterization Of Schiff Base Ligand and Complexesmentioning

confidence: 99%

“…According to Agarwal et al bidentate coordination involves a greater distortion from D 3h symmetry than monodentate coordination; therefore, bidentate complexes should show a larger separation of (n 1 þ n 4 ) [25]. By studying the spectra of a number of compounds with known crystal structures, Devi et al [24] showed that the separation of monodentate nitrate groups appeared to be 5e26 cm À1 and that of bidentate groups to be 25e66 cm À1 . However, these absorptions are very weak and can only be used for diagnosis when there are no other absorptions in this region.…”

Section: Characterization Of Schiff Base Ligand and Complexesmentioning

confidence: 99%

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Synthesis and characterization of insoluble cobalt(II), nickel(II), zinc(II) and palladium(II) Schiff base complexes: Heterogeneous catalysts for oxidation of sulfides with hydrogen peroxide

Menati

Rudbari

Askari

et al. 2016

Comptes Rendus. Chimie

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The condensation reaction of 1,2-bis(2 0 -aminophenoxy)benzene with 2pyridinecarbaldehyde in a mole ratio of 1:2 gives a new Schiff base ligand (L). Four Schiff base complexes, CoL(NO 3 ) 2 (1), NiLCl 2 (2), ZnL(NO 3 ) 2 (3) and Pd 2 LCl 4 (4) have been prepared by direct reaction of the ligand (L) and appropriate metal salts. The Schiff base ligand (L) has been characterized by IR, 1 H NMR and 13 C NMR spectroscopy and elemental analysis. Also, all complexes have been characterized by IR and XRD spectroscopy techniques and elemental analysis. The synthesized complexes have very poor solubility in all polar and non-polar solvents such as: H 2 O, MeOH, EtOH, CH 3 CN, DMSO, DMF, CHCl 3 , CH 2 Cl 2 , THF, etc; therefore, they have been used as heterogeneous catalysts. Catalytic performance of the complexes was studied in oxidation of thioanisole using hydrogen peroxide (H 2 O 2 ) as the oxidant. Various factors including the reaction temperature, amount of oxidant and catalyst amount were optimized. The palladium Schiff base complex, Pd 2 LCl 4 (4), shows better catalytic activity than other complexes. Therefore, the Pd(II) Schiff base complex has been used as a catalyst for oxidation of different sulfides to their corresponding sulfones in acetonitrile with hydrogen peroxide as the oxidant. The palladium Schiff base complex, Pd 2 LCl 4 (4), has shown a very good recyclability, up to five times, without any appreciable decreases in catalytic activity and selectivity.

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Section: Characterization Of Schiff Base Ligand and Complexesmentioning

confidence: 99%

Section: Characterization Of Schiff Base Ligand and Complexesmentioning

confidence: 99%

Synthesis and characterization of insoluble cobalt(II), nickel(II), zinc(II) and palladium(II) Schiff base complexes: Heterogeneous catalysts for oxidation of sulfides with hydrogen peroxide

Menati

Rudbari

Askari

et al. 2016

Comptes Rendus. Chimie

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“…The uranyl ion (UO 2 2 is of great signi®cance due to its versatile applications. Although it is of unusual solubility in organic phases, it is easily extractable from aqueous layers.…”

Section: Introductionmentioning

confidence: 99%

“…Although it is of unusual solubility in organic phases, it is easily extractable from aqueous layers. It shows little or no ionization; nitrate ions are coordinated in equatorial positions of the UO 2 unit [1,2]. Schiff bases derived form -diketones as well as the uranyl ion have gained much attention because of their biological [3,4], industrial [5±9], and analytical applications [10±15].…”

Section: Introductionmentioning

confidence: 99%

Physical Properties of Some New Uranyl Complexes with Ligands Derived from Acetone

Orabi

1998

Monatshefte fuer Chemie

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Uranyl complexes with 1,3-diphenyl-1-(2-hydroxy-anilidino)-1-propylidin-3-one (H 2 A), 1,3-diphenyl-1-ethanolimine-propylidin-3-one (HB 1 ), 4-phenyl-2-ethanolimino-2-butylidin-4-one (HB 2 ), and 2-ethanolimino-2-pentylidin-4-one (HB 3 ) as ligands were prepared and characterized by elemental analysis, electrical conductivity measurements, magnetic susceptibility determination, mass, IR, and UV/Vis spectroscopy, and thermogravimetry. The complexes can be formulated as [UO 2 L(H 2 O)(NO 3 )] Á nH 2 O with the exception of UO 2 -HB 1 which has to be written as [UO 2 L 2 (H 2 O)] Á nH 2 O. The structures of these complexes were ®tted using Alchemy III. The thermogravimetric studies suggest the following order of relative thermal stability of the complexes: UO 2 -H 2 A>UO 2 -HB 1 %UO 2 -HB 2 >UO 2 -HB 3 . ÁE act (calculated from the endothermic peaks) of the liberation of H 2 O of crystallization increases within the order UO 2 -HB 3 >UO 2 -HB 1 >UO 2 -HB 2 >UO 2 -H 2 A. The antimicrobial activities of the prepared complexes have been tested. Physikalische Eigenschaften einiger neuer Uranylkomplexe mit Acetonderivaten als LigandenZusammenfassung. Uranylkomplexe mit 1,3-Diphenyl-1-(2-hydroxy-anilidino)-1-propylidin-3-on (H 2 A), 1,3-Diphenyl-1-ethanolimin-propylidin-3-on (HB 1 ), 4-Phenyl-2-ethanolimino-2-butylidin-4-on (HB 2 ) und 2-Ethanolimino-2-pentylidin-4-on (HB 3 ) als Liganden wurden hergestellt und mittels Elementaranalyse, Konduktivita Èts-und Suszeptibilita Ètsmessungen, Massen-, IR-und UV/VisSpektroskopie sowie Thermogravimetrie charakterisiert. Die Komplexe ko Ènnen als [UO 2 L(H 2 O)(NO 3 )] Á nH 2 O formuliert werden; eine Ausnahme bildet UO 2 -HB 1 , dem die Formel [UO 2 L 2 (H 2 O)] Á nH 2 O zugeordnet wird. Die Strukturen der Komplexe wurden mit Hilfe des Programms Alchemy III ge®ttet. Die thermogravimetrischen Untersuchungen legen die Stabilita Ètsreihenfolge UO 2 -H 2 A>UO 2 -HB 1 %UO 2 -HB 2 >UO 2 -HB 3 nahe. ÁE act der Freisetzung des Kristallwassers, berechnet aus den endothermen Peaks, steigt in der Reihenfolge UO 2 -HB 3 >UO 2 -HB 1 >UO 2 -HB 2 >UO 2 -H 2 A. Die antimikrobielle Aktivita Èt der hergestellten Komplexe wurde untersucht.

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ChemInform Abstract: Uranyl Nitrate Complexes of Some Schiff Bases of 4‐Aminoantipyrine and Certain Carbonyl Compounds.

Devi

Indrasenan

1988

ChemInform

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Uranyl nitrate complexes of some Schiff bases of 4-aminoantipyrine and certain carbonyl compounds

Cited by 16 publications

References 6 publications

Synthesis and characterization of insoluble cobalt(II), nickel(II), zinc(II) and palladium(II) Schiff base complexes: Heterogeneous catalysts for oxidation of sulfides with hydrogen peroxide

Synthesis and characterization of insoluble cobalt(II), nickel(II), zinc(II) and palladium(II) Schiff base complexes: Heterogeneous catalysts for oxidation of sulfides with hydrogen peroxide

Physical Properties of Some New Uranyl Complexes with Ligands Derived from Acetone

ChemInform Abstract: Uranyl Nitrate Complexes of Some Schiff Bases of 4‐Aminoantipyrine and Certain Carbonyl Compounds.

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