Preparation and characterization of heterobimetallic tetraxanthates and their complexes with Lewis bases

Aggarwal, R. C.; Singh, Nanhai; Singh, Sunita

doi:10.1016/s0277-5387(00)84510-6

Cited by 21 publications

(14 citation statements)

References 19 publications

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“…xes (Fig. 3) show no bands in the visible region as expected for d 10 systems [44,45]. The electronic absorption spectra for the bisacylhydrazone ligands and their metal (II) complexes recorded in DMF solvent (10 −2 M) are given in Table 4.…”

Section: Electronic Absorption Spectramentioning

confidence: 70%

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Synthesis and characterization of bis-acylhydrazone derivatives as tetradentate ligands and their dinuclear metal(II) complexes

Mohammed¹

2012

Per. Pol. Chem. Eng.

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Two novel bis-acylhydrazone where as 1,4-diacetylbenzene bis(4-hydroxy benzoyl hydrazone) H IntroductionHydrazones are the condensation products of hydrazine derivatives with carbonyl compounds, they contain an acyclic group >C=N-N< . It is long since hydrazones and their derivatives, due to their high complexing ability, have attracted the attention of scientists. Depending on various factors (the nature of the hydrazone and the metal atom, reaction conditions, the ratio of reactants etc.) hydrazones form either mono-or polynuclear coordination compounds with metal atoms [1].Aroyl hydrazones and their metal derivatives often possess biological activity and can inhibit enzymatic reactions in the cell [2]-[4]. Edward et al. have shown that replacement of the aromatic group by other moieties in some antibiotics improves their antibiotic activity [5,6]. Apart from biological applications owing to the presence of the toxicologically important N-C=O moiety, hydrazones act as potential donors for different metal ions. These ligands contain an amide bond and are capable of undergoing keto-enol tautomerism: they can coordinate to central metal ions through nitrogen and/or oxygen [7]. Their coordination behaviour also depends upon the pH of the medium, the nature of the substituents and the metal [8].Intensive investigations of the coordination chemistry of dinuclear metal complexes with chelating ligands continue to be stimulated by interest for metallobiomolecules [9], the search for appropriate systems for binding and activating simple molecules, catalysis and magnetic interactions [10,11]. In spite of the greatest effort and success in the study of dinuclear copper(II) complexes, such complexes have still attracted much attention due to their interesting properties and the relative simplicity of their synthesis.Many studies of polyfunctional Schiff bases and monohydrazones as well as their complexes have been carried out [12,13]. Relatively few reports are available on the coordination behaviour of bis-acylhydrazone. These ligands might have interesting ligational features since they contain additional donor sites, i.e. C=O, N-H, azomethine nitrogen atom, etc. Herein, we report the synthesis and spectroscopic studies of dinuclear metal(II) polymeric complexes containing 1,4-diacetylbenzene bis(4-hydroxy benzoylhydrazone) (H 2 L 1 ) and

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Section: Electronic Absorption Spectramentioning

confidence: 70%

“…Comp. systems [44,45]. The electronic absorption spectra for the bis-acylhydrazone ligands and their metal (II) complexes recorded in DMF solvent (10 -2 M) are given in A 2 (F)(v 2 ) transitions for Co(II) and bove 1000 nm, which is beyond the detection range of our instrument .…”

Section: Electronic Absorption Spectramentioning

confidence: 99%

Synthesis and characterization of bis-acylhydrazone derivatives as tetradentate ligands and their dinuclear metal(II) complexes

Mohammed¹

2012

Per. Pol. Chem. Eng.

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“…The magnetic moment value of Ni(II) complex (3) found to be (3.86 B.M) and its electronic spectra show a band Ѵ 3 at 14792 cm -1 due to 3 T 1 (F)→ 3 T 1 (P) transition in tetrahedral geometry (33) . The Ni(II) complexes (9) show a diamagnetic moment (37) and the electronic spectra show two bands at 16666 cm -1 and 26315 cm -1 due to 1 A 1 g→ 1 A 2 g and 1 A 1 g→ 1 B 2 g which is consistent with square planar geometry (38) .…”

Section: Electronic Spectra and Magnetismmentioning

confidence: 71%

Synthesis and Characterization of Mn(II) ,Co(II) ,Ni(II) ,Cu(II) ,Zn(II) and Cd(II) Complexes with Di-Schiff Bases Derived from o- or m- Phenylenediamine and 9,10-Phenanthrenequinone

Al-Nama¹,

Abdullah²

2013

J.Edu.Sci.

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Aseries of new complexes of the type [MLCl 2 ] where M=Mn (II),Co(II),Ni(II),Cu(II),Zn(II),Cd(II) L=L 1 or L 2 represents di-Schiff base ligands: {L 1 =(N,N'E,N,N'E)-N,N'-(phenanthrene-9,10-diylidene) bis (benzene-1,2-diamine). L 2 =(N,N'E,N,N'E)-N,N'-(phenanthrene-9,10-di ylidene)bis(benzene-1,3-diamine)} have been prepared in (1:1)(M:L) molar ratio and charactrerized by electrical conductivity,magnetic moment, IR , UV-VIS and metal content analysis. Synthesis and Characterization of Mn(II) ,Co(II) ,Ni(II) ,Cu(II) …. 94 Conductivity data in DMF and DMSO solution showed that all complexes are non-electrolytes. Magnetic moment and electronic spectra indicate that some of the complexes have a tetrahedral geometry and the others have an square planar environment. The antibacterial activity against E.coli and S.aureus of L 1 and L 2 and some of their complexes derived from Cu(II) and Zn(II) illustrates that the complexes have higher activity than the corresponding organic ligand.

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“…The electronic spectra of the prepared four coordinated copper (II) complex gives broad absorption band at (15124) cm -1 , which can be assigned to the combination of transitions ( complexes with square-planar geometry [22,24,25] . The electronic spectra of six coordinated [28] , for Ni (II) complexes are (2.98, 3.01) B.M [29,30] . For Cu (II) complexes are (1.81, 1.99) B.M [31] .…”

Section: Ir Spectramentioning

confidence: 99%

“…For Cu (II) complexes are (1.81, 1.99) B.M [31] . These values are due to the presence of octahedral configuration for these complexes, while the magnetic moment of four coordinated complexes are, Co (II) complex is (2.40) B.M this indicate that cobalt has distorted tetrahedral structure [28] , but Ni (II) and Pd(II) gives no value, that is indicate that nickel and palladium complexes have square planar geometry, while Cu (II) complex is (1.66) B.M, this value is appropriate for square planar complex [29,30] . As shown in table 1.…”

Section: Ir Spectramentioning

confidence: 99%

Synthesis and Characterization of Co (II), Ni (II), Cu (II), and Pd(II) Complexes with mono sodium 2,4,6-trioxotetrahydropyrimidine-1(2H)-carbodithioate

Hameed¹

2017

djps

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Mono sodium 2,4,6-trioxotetrahydropyrimidine-1(2H)-carbodithioate (L) was prepared from These compounds were characterized using infra-red spectra FTIR, electronic spectra UV-VIS, proton nuclear magnetic resonance 1 H-NMR spectroscopy, Micro Elemental Analysis, and Magnetic Measurements.These measurements indicate that the prepared complexes have octahedral, square planer or tetrahedral geometry. Molar Conductance measurements shows all the prepared complexes are non-electrolytic except the palladium complex of the type [Pd(L)(H2O)2]Cl.

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Preparation and characterization of heterobimetallic tetraxanthates and their complexes with Lewis bases

Cited by 21 publications

References 19 publications

Synthesis and characterization of bis-acylhydrazone derivatives as tetradentate ligands and their dinuclear metal(II) complexes

Synthesis and characterization of bis-acylhydrazone derivatives as tetradentate ligands and their dinuclear metal(II) complexes

Synthesis and Characterization of Mn(II) ,Co(II) ,Ni(II) ,Cu(II) ,Zn(II) and Cd(II) Complexes with Di-Schiff Bases Derived from o- or m- Phenylenediamine and 9,10-Phenanthrenequinone

Synthesis and Characterization of Co (II), Ni (II), Cu (II), and Pd(II) Complexes with mono sodium 2,4,6-trioxotetrahydropyrimidine-1(2H)-carbodithioate

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