3‐Hydroxy‐2‐naphthoate Complexes of Transition Metals with Hydrazine ‐ Preparation, Spectroscopic and Thermal Studies

Arunadevi, N.; Vairam, S.

doi:10.1155/2009/937216

Cited by 13 publications

(8 citation statements)

References 4 publications

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“…In the case of Zn carboxylate, an additional band observed at 848 cm -1 due to the presence of coordinated water molecule [34]. The hydrazine complexes of cobalt, zinc, nickel and cadmium hydrazine complexes show N-N stretching frequency in the range 964-979 cm -1 indicating bidentate bridging nature of hydrazine [35]. The entire hydrazine complex shows N-H stretching frequency range 3248-3302 cm -1 .…”

Section: Ir Spectra Of Complexesmentioning

confidence: 98%

Synthesis, characterization, thermal behavior and antimicrobial activity of 3-methyl benzoate complexes of transition metal with hydrazine

Mohanapriya¹,

Muthukumaran²,

Vairam³

2016

Bull. Chem. Soc. Eth.

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ABSTRACT. Reaction of the ligands, 3-methyl benzoic acid (mbH) and hydrazine with transition metal ions form the complexes of formulae, [M(N2H4)2(mb)2].H2O where M = Co(II) and Zn(II) at pH = 5-6, [M(N2H4)n(mb)2].xH2O where M = Ni(II), n = 2, x = 0 at pH = 5 and M = Cd, n = 1, x = 1 at pH = 6. The same acid also forms metal carboxylates with zinc and copper of formula, [Zn(mb)2H2O].H2O at pH = 6 and [Cu(mb)2].H2O at pH = 5, respectively. The IR spectra of the complexes show that hydrazine is present as bridging bidentate ligand and the carboxylic acid as monodentate bridging carboxylate anion. The electronic spectra, magnetic moments and ESR spectral data suggest the coordination number. Thermal studies show that cobalt, zinc and nickel complexes containing hydrazine, and carboxylates of copper, zinc on their thermal decomposition form the corresponding metal oxides in nano size in the temperature range 755-815 °C. The antibacterial and antifungal activity show that both activities of the complexes are higher than that of the acid and among the complexes, cadmium compound shows more antimicrobial activity towards bacteria and fungi.

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Section: Ir Spectra Of Complexesmentioning

confidence: 98%

Synthesis, characterization, thermal behavior and antimicrobial activity of 3-methyl benzoate complexes of transition metal with hydrazine

Mohanapriya¹,

Muthukumaran²,

Vairam³

2016

Bull. Chem. Soc. Eth.

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“…Hydrazine complexes of the first transition metal ions with a variety of carboxylic acids have been reported in the literature. These include simple and substituted aromatic mono [21][22][23][24][25], di [26][27], tricarboxylic [28] and tetracarboxylic acids. [29].…”

Section: Introductionmentioning

confidence: 99%

Co-ordination behaviour of hydrazine and isomers of acetoxy benzoic acids with transition metal ions

Bai¹,

Vairam²

2021

Bull. Chem. Soc. Eth.

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ABSTRACT. New hydrazine complexes of some divalent transition metal ions of formulae, [M{(2-ab)2(N2H4)}].3H2O, [M{(3-ab)2(N2H4)}].3H2O and [M{(4-ab)2(N2H4)2}].2H2O where M = Co, Ni, Zn and Cd; 2-abH = 2-acetoxy benzoic acid, 3-abH = 3-acetoxy benzoic acid and 4-abH = 4-acetoxy benzoic acid were prepared using their respective metal nitrates and hydrazine hydrate at pH 6 and 5, respectively, and characterized by elemental analysis, IR and UV-reflectance spectroscopic techniques, thermo analytical technique, powder XRD, SEM-EDX and magnetic susceptibility measurements. All the transition metal complexes were sparingly soluble in water. The IR spectra of complexes showed N-N absorptions of hydrazine in the range of 964-988 cm-1 substantiating the bidentate bridging coordination of hydrazine. They showed endothermic decomposition in the range of 67-100 °C, exothermic dehydrazination in the range, 210-281 °C and an oxidative decomposition between 350 and 490 °C to form their respective metal oxides. The electronic spectral and magnetic susceptibility data could substantiate the distorted octahedral geometry of nickel and cobalt complexes and the XRD pattern indicates the existence of isomorphism. Crystals of [Cd(H2O)3((C6H4(4-OH)(COO))2].H2O obtained as by-product, was also characterized using single crystal XRD, IR and thermal studies. KEY WORDS: Acetoxy benzoic acids, Hydrazine, Thermal analysis, Single crystal XRD Bull. Chem. Soc. Ethiop. 2021, 35(2), 337-350. DOI: https://dx.doi.org/10.4314/bcse.v35i2.9

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“…PA includes two 3-hydroxy-2-naphthoic acid units bridged at the 1-position by a methylene (-CH 2 -) group, as shown in Scheme 1. PA has been used for salt formation in pharmaceutical formulations, [38] and PA and its monomer, 3-hydroxy-2-naphthoic acid, act as ligands in transition metal complexes; [39][40][41][42][43][44][45] however, no studies have described the use of PA or its disodium salt as a complexing agent for the thermal preparation of monodisperse NiONPs. We attempted to use Na 2 PA in a simple thermal preparation of NiONPs for use as electrocatalysts in water oxidation.…”

Section: Introductionmentioning

confidence: 99%

Influence of Pamoic Acid as a Complexing Agent in the Thermal Preparation of NiO Nanoparticles: Application to Electrochemical Water Oxidation

et al. 2018

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We developed a thermal decomposition method for preparing NiO nanoparticles (NiONPs) using disodium salt of pamoic acid (Na2PA) as a complexing agent and Ni(NO3)2⋅6H2O as a nickel precursor. Prior to thermal decomposition, Ni(NO3)2⋅6H2O was mixed with Na2PA in ethanol, and the ethanol was evaporated succesively. The dried reaction mass was characterized using Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and thermal gravimetric analysis. Thermal decomposition was then performed in air to obtain the NiONPs. The role of Na2PA in the synthesis of NiONP was evaluated by preparing NiONPs according to the protocol described above without the addition of Na2PA. The X‐ray diffraction data indicated that crystalline NiO (bunsenite, cubic crystal system) formed with or without Na2PA; however, field emission scanning electron microscopy images showed that smaller monodisperse NiONPs formed only with the addition of Na2PA. Without Na2PA, the obtained NPs were quite large and polydisperse. The sizes of the NiONPs prepared in the presence of Na2PA were determined using transmission electron microscopy imaging to be 19.1 ± 3.2 nm. The electrocatalytic activity of the NiONPs toward water oxidation under alkaline conditions was evaluated by immobilizing the NPs onto an in‐house prepared filter paper derived carbon electrode, and compared.

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3‐Hydroxy‐2‐naphthoate Complexes of Transition Metals with Hydrazine ‐ Preparation, Spectroscopic and Thermal Studies

Cited by 13 publications

References 4 publications

Synthesis, characterization, thermal behavior and antimicrobial activity of 3-methyl benzoate complexes of transition metal with hydrazine

Synthesis, characterization, thermal behavior and antimicrobial activity of 3-methyl benzoate complexes of transition metal with hydrazine

Co-ordination behaviour of hydrazine and isomers of acetoxy benzoic acids with transition metal ions

Influence of Pamoic Acid as a Complexing Agent in the Thermal Preparation of NiO Nanoparticles: Application to Electrochemical Water Oxidation

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