Dimethyl and diphenyl formamide complexes of lanthanide perchlorates

Krishnamurthy, S. S.; Soundararajan, S.

doi:10.1139/v69-157

Cited by 48 publications

(16 citation statements)

References 2 publications

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“…This suggests that ClO 4 ) is outside the coordination sphere of the complexes [23]. In all the cobalt(II) thiocyanate complexes the three fundamental absorptions, i.e., (C-N) stretching (m 1 ), (C-S) stretch (m 3 ) and (N-C-S) bending (m 2 ), are identified in the 2045-2035, 845-835 and 475-470 cm )1 regions, respectively.…”

Section: Anionsmentioning

confidence: 99%

Cobalt(II) complexes of various thiosemicarbazones of 4-aminoantipyrine: syntheses, spectral, thermal and antimicrobial studies

Prasad

Agarwal²

2007

Transition Met Chem

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An interesting series of cobalt(II) complexes of the new ligands: 4[N-(benzalidene)amino]antipyrinethiosemicarbazone (BAAPTS), 4[N-(2¢-hydroxy-benzalidene)amino]antipyrinethiosemicarbazone (HBAAPTS) and 4[N-(2¢-hydroxy-1¢-naphthalidene)amino]antipyrinethiosemicarbazone (HNAAPTS) were synthesized by reaction with Co(II) salts in ethanol. The general stoichiometry of the complexes was found to be [CoX 2 (H 2 O)(L)] and [Co(L) 2 ](ClO 4 ) 2 ,where X = Cl, NO 3 , NCS or CH 3 COO and L = BAAPTS, HBAAPTS or HNAAPTS. The complexes were characterized by elemental analysis, molar conductivity measurement, molecular weight determination, magnetic moments at room temperature, infrared and electronic spectra. All the thiosemicarbazones behave as neutral tridentate (N, N, S) donor ligands. The conductivity measurements in PhNO 2 solution indicated that the chloro, nitrato, thiocyanato and acetate complexes are essentially non-electrolytes, while the perchlorate complexes are 1:2 electrolytes. Thermogravimetric studies were performed for some representative complexes and the decomposition mechanism proposed. Antibacterial and antifungal properties of the ligands and their cobalt(II) complexes have also been examined and it has been observed that the complexes are more potent bactericides than the ligand.

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Section: Anionsmentioning

confidence: 99%

Cobalt(II) complexes of various thiosemicarbazones of 4-aminoantipyrine: syntheses, spectral, thermal and antimicrobial studies

Prasad

Agarwal²

2007

Transition Met Chem

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“…The occurrence of two strong bands at ~1080 and 620 cm -1 in the spectra of perchlorato complexes attributed to ν 3 and ν 4 vibrations of the ionic perchlorate suggest [46,47] that the perchlorate group are present outside the coordination sphere [48][49][50]. In present complexes [Ln(CAAPS) 2 .DPSO](ClO 4 ) 3 , the presence of very strong ν 3 band is in 1105-1080 cm -1 and strong narrow ν 4 band is 630-620 cm -1 region indicate tetrahedral symmetry of the perchlorate ion, which is not bonded to Ln 3+ ion [49][50] (Table 5).…”

Section: 2(caaps)mentioning

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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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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“…In all the perchlorate complexes [Ln(ebaaps) 2 .py](ClO 4 ) 3 , only two strong n 3 complexation and that these ions are not bonded to Ln 3+ ions 33,34 . This conclusion is also supported by the conductance and molecular weight data.…”

Section: Discussionmentioning

confidence: 99%

Synthesis and Characterization of Some Seven Coordinated Complexes of Lanthanide(iii) Perchlorates with 4-[n-(4‘- Ethylbenza-lideneamino)]- Antipyrine Semicarbazone as Primary Ligand and Pyridine as Secondary Ligand

Kaushik¹

2017

Orient. J. Chem

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Mixed ligands complexes of lanthanide(ΙΙΙ) perchlorates obtained from 4-[N-(ethylbenzalideneamino)]-antipyrine semicarbazone (ebaaps) as primary ligand and pyridine(py) as secondary ligand have been synthesized and characterized. The analytical studies on these compounds include elemental analyses, molecular weight determination, molar conductance, and magnetic susceptibility, infrared and electronic spectra. The primary ligand, (ebaaps), in these complexes behaves as neutral tridentate (O,N,N) while the secondary ligand pyridine(py) acts as unidentate nitrogen donor. The general composition of these complexes may be given as [Ln(ebaaps) 2 .py](ClO4) 3 , [ Ln = La, Pr, Nd, Sm, Gd, Tb, Dy or Ho]. The values of nephelauxetic effect (β), covalence factor (b 1/2 ), Sinha parameter (δ %) and the angular overlap parameter (η) of the complexes have been calculated, and their thermal stabilities worked out by TGA.

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Dimethyl and diphenyl formamide complexes of lanthanide perchlorates

Cited by 48 publications

References 2 publications

Cobalt(II) complexes of various thiosemicarbazones of 4-aminoantipyrine: syntheses, spectral, thermal and antimicrobial studies

Cobalt(II) complexes of various thiosemicarbazones of 4-aminoantipyrine: syntheses, spectral, thermal and antimicrobial studies

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 and Characterization of Some Seven Coordinated Complexes of Lanthanide(iii) Perchlorates with 4-[n-(4‘- Ethylbenza-lideneamino)]- Antipyrine Semicarbazone as Primary Ligand and Pyridine as Secondary Ligand

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