Nickel(II) complexes of tricyclic N<sub>10</sub>-cage ligands

Rastogi, Ankur; Anurag, .; Nayan, Ram

doi:10.1080/00958971003637059

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…In addition to these, some other bands also These values support tetragonally distorted octahedral (really D 4h ) symmetry around V(II) in complexes 40 .…”

Section: Vanadium(ii) Complexesmentioning

confidence: 76%

“…The band at 1000-980 cm -1 is the characteristic absorption band for coordinated nitrate group and the absorption band at 1445-1460 cm -1 confirms the monodentate coordination mode of NO 3 group 38 . Furthermore two bands appearing at 1620-1630 and at 1300 cm -1 in complexes 3, 6 and 9 may safely be assigned to the asymmetric and symmetric stretching of monodentate acetate ion 39,40 .…”

Section: Ftir Spectramentioning

confidence: 94%

“…But as the next excited crystal field component of 4 F is4 T 2g which causes the mixing of the singly degenerate A 2g term with triply degenerate 4 T 2g term. Subsequently magnetic moment value of a complex is given by m eff = m s (1-4l/10Dq) where l is spin orbit coupling constant which is positive for d 3 system40 . The d-d transitions cause four absorption bands in UV/Visible spectrum of V(II) complexes.…”

mentioning

confidence: 99%

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Spectroscopic Elucidation of Some Complexes of Vanillin Semicarbazone

et al. 2021

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3-Phenyl-4-methoxybenzaldehyde undergoes condensation with semicarbazide hydrochloride to form a Schiff-base i.e. 3-phenyl-4-methoxybenzaldehyde semicarbazone (abbreviated as MBS). It undergoes complexation with Vanadium(II), Manganese(II), and Copper(II). The comparison of FTIR-spectra of complexes with that of free ligand helps ascertain the coordination points of ligand through the nitrogen of –CH=N– group and oxygen of group. The axial ligands have been varied by chloride, acetate and nitrate ions. The UV/Visible and ESR spectra of complexes predicts their tetragonally distorted octahedral (D4h) symmetry. The tetragonal distortion parameter (Dt) is observed maximum for chloride while it is minimum for nitrate along z-axis. Both vanillin and semicarbazide are established biologically active compounds and hence their biological activities may be enhanced by their complexation and than a versatile field may be developed for further exploration.

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“…In addition to these, some other bands also These values support tetragonally distorted octahedral (really D 4h ) symmetry around V(II) in complexes 40 .…”

Section: Vanadium(ii) Complexesmentioning

confidence: 76%

Section: Ftir Spectramentioning

confidence: 94%

mentioning

confidence: 99%

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Spectroscopic Elucidation of Some Complexes of Vanillin Semicarbazone

et al. 2021

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“…The sharp band appearing at 1640 cm -1 in the spectra of the free ligand and is assigned to ν CH=N , which undergoes red shift and appears at 1615-1610 cm -1 in the I.R. spectra of complexes, which is indicative of co-ordination through azomethine nitrogen of the ligand [22][23] . A doublet observed at 1270 cm -1 and 1260 cm -1 is farely assigned to ν CH3O group of the ligand 24,25 .…”

Section: Ftir Spectrmentioning

confidence: 99%

Studies of Distorted Octahedral Complexes of Cobalt, Nickel and Copper and Their Antibacterial Properties

Kumar

Singh²,

Kumari

et al. 2018

Orient. J. Chem

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The ligand, 3-hydroxy-4-methoxybenzaldehydethiosemicarbazone has been prepared by the condensation of 3-hydroxy-4-methoxybenzaldehyde and thiosemicarbazide. With the help of this ligand the complexes of Co(II), Ni(II) and Cu(II) have been prepared with general formula [ML2X2] where X is secondary ligand, Cl–, NO3– and CH3COO–. The composition of complexes has been established by their microanalysis, while the metal contents have been determined gravimetrically and volumetrically. On the basis of IR spectra, the coordinating mode of ligand has been determined and has been found to have coordinated through azomethine nitrogen and thione sulphur. The magnetic moment of Co(II) complexes has been found between 4.96-4.72 B. M. The value is slightly higher than the μs value corresponding to three unpaired electrons (3.872 B.M). The increase in value may be attributed to orbital contribution from 4T1g ground state cubic term. The appearance of four bands in their electronic spectra is indicative of tetragonally distorted octahedral geometry of Co(II) complexes. The magnetic moment (3.20-3.30 B. M.) and appearance of 4 bands in the electronic spectra of Ni(II) complexes confirms the distorted octahedral geometry of the complexes. The magnetic moment of Cu(II) complexes has been determined to be (1.95-2.20 B. M.) which shows that Cu(II) complexes are magnetically dilute complexes. The appearance of three bands in their electronic spectra confirms John - Tellor distortion in octahedral symmetry of Cu(II) complexes. The various crystal field parameters exhibiting tetragonal distortion in the octahedral symmetry have also been derived. The positive value of Dt predicts tetragonal elongation in Oh symmetry.

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