Spectral and structural studies of nickel(II) complexes of salicylaldehyde 3-azacyclothiosemicarbazones

Latheef, Leji; Kurup, M.R. Prathapachandra

doi:10.1016/j.poly.2007.08.048

Cited by 37 publications

(15 citation statements)

References 32 publications

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“…Nevertheless, the few examples of ONS ligands derived from S-alkyldithiocarbazates have been shown to form copper(II) complexes with interesting magnetic properties [25][26][27]. The related ONS thiosemicarbazones have attracted the attention of many research groups because of the interesting physical and chemical properties of their complexes [28][29][30][31][32][33]. For example, the dimeric nickel(II) complex of the ONS tridentate thiosemicarbazone, 2-hydroxy-5-methylacetophenone-N, N-dimethylthiosemicarbazone has been shown to catalyze the reaction, CO ?…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectroscopy, and X-ray crystal structures of copper(II) complexes of the tridentate ONS ligand formed by condensation of 4,4,4-trifluoro-1-(2-thienyl)-2,4-butanedione with S-benzyldithiocarbazate

Ali

Mirza

Butcher

et al. 2011

Transition Met Chem

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A new tridentate ONS ligand, H 2 L, has been synthesized by condensing thenoyltrifluoroacetone(4,4,4-trifluoro-1-(2-thienyl)-2,4butaneanedione) with S-benzyldithiocarbazate and its structure determined by X-ray diffraction. In the solid state, the Schiff base exists as the ketoamine-thioketo tautomer but in solution and in the presence of copper(II), it converts to the enol-thiol form and deprotonates to give copper(II) complexes of formula, [CuL] and [CuLL 1 ] (L = doubly deprotonated form of the ligand; L 1 = py, bipy or phen] which have been characterized by magnetic, spectroscopic, and X-ray diffraction studies. An X-ray crystallographic analysis shows that [CuL(py)] has a square-planar geometry with the ligand coordinated to the copper(II) center via the enolate oxygen, the azomethinic nitrogen and the thiolate sulfur, the fourth coordination position being occupied by pyridine. The [CuL(bipy)] complex is five-coordinate with a structure close to squarepyramidal in which the Schiff base acts as a doubly deprotonated tridentate ONS ligand and bipy is bidentate.

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Section: Introductionmentioning

confidence: 99%

Synthesis, spectroscopy, and X-ray crystal structures of copper(II) complexes of the tridentate ONS ligand formed by condensation of 4,4,4-trifluoro-1-(2-thienyl)-2,4-butanedione with S-benzyldithiocarbazate

Ali

Mirza

Butcher

et al. 2011

Transition Met Chem

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“…The cis N(12)-Ni(1)-N(9) and cis N(12)-Ni(1)-N (19) bond angles are 81.79(17)°and 87.91 (19)°, respectively, revealing the distortion of the square planar geometry. The bond distances are Ni(1)-N(12) 1.851(4) Å , Ni(1)-N(19) 1.897(4) Å , which are comparable with analogous square planar nickel(II) complexes [25]. The imine double bond distances N 9 =C 8 1.297(7) Å and N 12 =C 13 1.290(7) Å suggest that the electronic effects on the imine double bonds are more important than the geometric factors in case of 1 [26,27].…”

Section: Crystal Structure Of [Ni(bpse)](bf 4 )mentioning

confidence: 55%

Spectroscopic, structural and magnetic studies of nickel(II) complexes with tetra- and pentadentate ligands

Patel

Shukla

Singh

et al. 2009

Transition Met Chem

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Two new nickel(II) complexes, namely [Ni-(BPSE)](BF 4 ) 1, and [Ni (5-BST)CH 3 OH]ClO 4 2 [BPSE = 2-benzoylpyridinesalicylidene ethylenediamine, 5-BST = 5-bromosalicylidene-tris(2-aminoethyl)amine] have been synthesized and characterized using various physicochemical methods. The magnetic and spectroscopic data indicate a distorted square planar geometry for complex 1, while complex 2 is assigned a distorted octahedral geometry. Complex 1 crystallized in the triclinic space group P-1. Complex 2 adopts an octahedral geometry with space group symmetry P 21/n. The superoxide dismutase activity of these complexes has been measured.

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“…The Ni(II) complex reflects the trend of increasing the size of the ligand, the lower shift in the energy of the maxima d-d bands. This is presumably due to weakening of the coordinate bond with increased bulkiness of the ligand [37]. The spectro-chemical parameters 10Dq, B, and β are calculated applying the following equations:…”

Section: Electronic Spectra and Magnetic Moment Measurementsmentioning

confidence: 99%

Elaborated studies on nano-sized homo-binuclear Mn(II), Fe(III), Co(II), Ni(II), and Cu(II) complexes derived from N2O2 Schiff base, thermal, molecular modeling, drug-likeness, and spectral

Shah

Abou‐Melha

Saad

et al. 2015

J Therm Anal Calorim

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A series of new homo-binuclear nano Mn(II), Fe (III), Co(II), Ni(II), and Cu(II) complexes were synthesized using a Schiff base ligand derived by condensation of p-phenylenediamine with 2-hydroxy-1-naphthaldehyde. The prepared complexes were characterized using elemental, thermal analyses, FTIR, 1 HNMR, 13 CNMR, UV-Vis, XRD, SEM, molar conductance, and magnetic moment measurements. FTIR spectral studies revealed the interaction of the ligand as bi-negative tetra-dentate towards Mn(II) and Fe(III) atoms, whereas the ligand molecule coordinates in neutral tetra-dentate mode towards Co(II), Ni(II), and Cu (II) ions. The geometries proposed are mainly octahedral configuration surrounds the central atoms referring to the electronic spectral data and magnetic measurements. The calculations abstracted from XRD patterns propose the nano-sized complexes. The SEM images show the nanosized appearance of the particles except for the Ni(II)-complex. Thermo-gravimetric analysis was used to ensure the nature of the presence of solvent molecules attaching to the complexes. Molecular modeling was performed to assert the structural formula proposed for the ligand and some of its complexes. Also, drug-likeness was theoretically estimated to display the probable biological activity of the free ligand through a theoretical comparison with known drugs.

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Spectral and structural studies of nickel(II) complexes of salicylaldehyde 3-azacyclothiosemicarbazones

Cited by 37 publications

References 32 publications

Synthesis, spectroscopy, and X-ray crystal structures of copper(II) complexes of the tridentate ONS ligand formed by condensation of 4,4,4-trifluoro-1-(2-thienyl)-2,4-butanedione with S-benzyldithiocarbazate

Synthesis, spectroscopy, and X-ray crystal structures of copper(II) complexes of the tridentate ONS ligand formed by condensation of 4,4,4-trifluoro-1-(2-thienyl)-2,4-butanedione with S-benzyldithiocarbazate

Spectroscopic, structural and magnetic studies of nickel(II) complexes with tetra- and pentadentate ligands

Elaborated studies on nano-sized homo-binuclear Mn(II), Fe(III), Co(II), Ni(II), and Cu(II) complexes derived from N2O2 Schiff base, thermal, molecular modeling, drug-likeness, and spectral

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