Studies on Some Thorium(IV) Complexes with High Coordination Numbers Derived from Semicarbazones of 4‐Aminoantipyrine

Agarwal, Rakesh; Chakraborti, Indranil; Agarwal, Himanshu

doi:10.1081/sim-200026274

Cited by 10 publications

(19 citation statements)

References 30 publications

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“…In the present complexes, as expected the ν(NH 2 ) of the hydrazinic nitrogen of semicarbazide (~1622 cm -1 ) is absent in the infrared spectra [8]. It has also been observed that the amide-II band is shifted towards the lower energy side compared to that of the semicarbazone.…”

Section: Infrared Spectrasupporting

confidence: 56%

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Synthesis, physico-chemical and thermal characteristics of seven and ten coordinated complexes of trivalent lanthanides derived from 4[N-(cinnamalidene)amino]antipyrine semicarbazone and diphenyl sulfoxide

Agarwal

Prakash

Kumar

et al. 2007

JICS

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In present studies a new series of twenty four complexes of seven and ten coordinated compounds derived from 4[Ncinnamalidene)amino]antipyrine semicarbazone (CAAPS) as primary ligand and diphenyl sulfoxide (DPSO) as secondary ligand has been reported. All the complexes have the general composition LnX 3 .n(CAAPS).DPSO (Ln = La, Pr, Nd, Sm, Gd, Tb, Dy or Ho, X = NCS or ClO 4 , n = 2, X = NO 3 , n = 1). The compounds have been characterized by elemental analysis, molar conductance, magnetic susceptibility, infrared and electronic spectra. Thermal characteristics were also reported. Based on the data appropriate structures are assigned for these complexes.

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Section: Infrared Spectrasupporting

confidence: 56%

“…The volume of the solution was reduced on a water bath, cooled, filtered and the filtrate was used for complexation [7]. The ligand CAAPS was synthesized in the laboratory by a reported method [8]. Diphenyl sulfoxide (DPSO) was obtained from Merck.…”

Section: Dpso Experimentalmentioning

confidence: 99%

Synthesis, physico-chemical and thermal characteristics of seven and ten coordinated complexes of trivalent lanthanides derived from 4[N-(cinnamalidene)amino]antipyrine semicarbazone and diphenyl sulfoxide

Agarwal

Prakash

Kumar

et al. 2007

JICS

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“…Crystals of ThX 4 (X = Cl -, Br -, I -or NCS -) were prepared by known methods [9]. The ligands HNAAPS and CAAPS were synthesized by known methods [7].…”

Section: Methodsmentioning

confidence: 99%

“…Empirical assignments by referring to the group frequencies may not be effective since coupling between various modes of vibration are expected as a result of resonance in the pyrazolone ring. The infrared absorption of both semicarbazones have been assigned by a comparison of their spectra with those of antipyrine, 4-aminoantipyrine [10,11] and some previous works on semicarbazones [7,12,13]. The key infrared spectral bands of free ligands and their thorium(IV) complexes are given in Table 2.…”

Section: Infrared Spectramentioning

confidence: 99%

“…In view of the variations in stoichiometry from ligand to ligand [2,3] [4][5][6]. Recently, we published our work [7] on thorium(IV) complexes of semicarbazones. In continuation of our work on thorium(IV), we report here the synthesis, spectral and thermal properties of some mixed ligand complexes of thorium(IV) derived from semicarbazones and DPSO.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, spectral and thermal investigations of some mixed ligand complexes of thorium(IV) derived from semicarbazones and diphenyl sulfoxide

Agarwal

Prasad

2005

JICS

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In the present work, the authors describe the synthesis of some mixed ligand complexes of thorium(IV) derived from 4[N-(2'-hydroxy-1'-naphthalidene)amino]antipyrine semicarbazone (HNAAPS) or 4[N-(cinnamalidene)amino]antipyrinesemicarbazone (CAAPS) as primary ligand and diphenyl sulfoxide (DPSO) as secondary ligand with the general composition ThX 4 .n(L).DPSO (n = 1, X = Cl, Br, NCS or NO 3 ; n = 2, X = I or ClO 4 , L = HNAAPS or CAAPS). All the compounds were characterized through elemental analysis, molar conductance, molecular weight, infrared data and thermogravimetric analysis. The infrared studies reveal that the semicarbazones behave as neutral tridentate (N,N,O) while DPSO coordinates through its oxygen atom. The nitrates are bicovalently bonded, while thiocyanates are N-coordinated in these compounds. In conclusion, the coordination number of the central metal ion displays coordination number 7, 8, 9 or 12 depending on the nature of the anionic ligands.

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Synthesis, characterization, photophysical, and magnetic studies of mixed‐ligand thorium(IV) complex of 2‐hydroxy‐5‐sulfobenzoic acid and 1,10‐phenanthroline

Wani

Pandith

Hussain³

et al. 2023

Applied Organom Chemis

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The new eight‐coordinate complex of thorium(IV) was synthesized by the reaction of Th(NO3)4.4H2O with 1,10‐phenanthroline(phen) and 2‐hydroxy‐5‐sulfobenzoic acid (SSA) by coprecipitation method. An environment friendly chelating agent sulfosalicylic acid (SSA) having oxygen donor atoms, phen with delocalized π‐electron system, and N‐donor atoms were used during the preparation of complex. The complex was characterized on the basis of elemental analysis, Fourier transform infrared (FTIR) spectroscopy, UV–Vis spectroscopy, powder X‐ray diffraction (PXRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The complex was further assessed for structural and magnetic behavior. The results revealed that the complex has been completely formed as eight coordinated, amorphous in nature, diamagnetic, air stable, granular surface morphology, and water soluble. Furthermore, the FTIR studies of the complex demonstrate coordination of Th(IV) with SSA, phen, and nitrate by the participation of oxygen and nitrogen atoms. According to the results obtained, the changes in the IR spectra indicate that the coordination takes place via nitrogen atoms of phen, oxygen atoms of SSA and nitrate ions, the former two acting as bidentate ligands while as the latter coordinate via the monodentate mode. Moreover, from the emission spectra, the complex also showed emission atom excitation wavelength of 290 nm.

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Studies on Some Thorium(IV) Complexes with High Coordination Numbers Derived from Semicarbazones of 4‐Aminoantipyrine

Cited by 10 publications

References 30 publications

Synthesis, physico-chemical and thermal characteristics of seven and ten coordinated complexes of trivalent lanthanides derived from 4[N-(cinnamalidene)amino]antipyrine semicarbazone and diphenyl sulfoxide

Synthesis, physico-chemical and thermal characteristics of seven and ten coordinated complexes of trivalent lanthanides derived from 4[N-(cinnamalidene)amino]antipyrine semicarbazone and diphenyl sulfoxide

Synthesis, spectral and thermal investigations of some mixed ligand complexes of thorium(IV) derived from semicarbazones and diphenyl sulfoxide

Synthesis, characterization, photophysical, and magnetic studies of mixed‐ligand thorium(IV) complex of 2‐hydroxy‐5‐sulfobenzoic acid and 1,10‐phenanthroline

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