Synthesis and spectroscopic characterization of new mono- and binuclear complexes of some NH(1) thiosemicarbazides

El-Metwally, Nashwa M.; Gabr, I.M.; Shallaby, A. M.; El‐Asmy, Ahmed A.

doi:10.1080/00958970500155771

Cited by 58 publications

(34 citation statements)

References 40 publications

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“…e band at 1631 cm −1 is characteristic of the azomethine nitrogen in the free ligand. e lowering in this frequency to 1602-1620 cm €1 in all the complexes indicates involvement of the azomethine nitrogen in coordination with metal [23]. e ligand shows (O-H) at 3289 cm −1 , and the disappearance of this peak in spectra of all complexes indicates that chelation takes place via the phenolic OH and for nickel complex a broad variable band at 3981 cm −1 is attributed to OH of the coordinated water molecules.…”

Section: Ir Spectral Studiesmentioning

confidence: 99%

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Anitha¹,

Sheela

Tharmaraj

et al. 2013

International Journal of Inorganic Chemistry

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New complexes of 2,3-bis(5-(4-chlorophenyl)diazenyl)-2-hydroxybenzylideneamino)maleonitrile (CDHBDMN) with VO(II), Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) were synthesized and characterized by analytical and physicochemical techniques, that is, elemental analyses, molar conductivity, UV, IR, EPR, 1 H-NMR spectra, magnetic susceptibility and also by aid of scanning electron microscopy (SEM), nonlinear optical study (NLO), �uorescence spectral studies, and solvatochromic behaviors. Electronic and magnetic susceptibility measurements of the complexes indicate square pyramidal geometry for VO(II), octahedral for Ni(II), and square planar geometry for all the other complexes. e EPR spectral data provide information about their structures on the basis of Hamiltonian parameters and the degree of covalency. ese metal complexes were also tested for their antibacterial and antifungal activities to assess their inhibiting potential. Metal-mediated �uorescence enhancement is observed on complexation of the azo Schiff base ligand. e synthesized compounds were investigated for nonlinear optical properties, and the surface morphology of the Cu(II) complex was studied by scanning electron microscopy.

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Section: Ir Spectral Studiesmentioning

confidence: 99%

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Anitha¹,

Sheela

Tharmaraj

et al. 2013

International Journal of Inorganic Chemistry

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“…The phenolic groups in the free ligands exhibit strong bands at about 1,210 cm -1 ; however, the bands appear at lower wave numbers (1,183 cm -1 for (1) and 1,181 cm -1 for (2)) in the complexes, indicating the coordination of the phenolate O atoms. Other weak absorption bands in the region 470-430 cm -1 for both complexes can be assigned to the Co-O and Co-N bonds [30,31].…”

Section: Resultsmentioning

confidence: 95%

Syntheses, crystal structures and antibacterial activities of azido-bridged cobalt(III) complexes with Schiff bases

Zhu

2010

Transition Met Chem

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Two end-on azido-bridged Co(III) complexes, [Co 3 (L1) 2 (l 1,1 -N 3 ) 4 (N 3 ) 2 (OH 2 )(OCH 2 CH 3 )]Á0.5H 2 O (1) and [Co 2 (L2) 2 (l 1,1 -N 3 ) 2 (N 3 ) 2 ] (2), where L1 and L2 are the deprotonated form of 5-methoxy-2-[(2-morpholin-4-ylethylimino)methyl]phenol and 2-ethoxy-6-[(2-isopropylaminoethylimino)methyl]phenol, respectively, were prepared and structurally characterized by physicochemical and spectroscopic methods and single crystal X-ray determination. Complex (1) is a trinuclear Co compound, while complex (2) is a centrosymmetric dinuclear Co compound. In both complexes, the Co atoms are in octahedral coordination. The preliminary biological tests show that the complexes have excellent antibacterial activity.

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“…The continuation of the decomposition indicates that a higher thermal stability of the complexes. Such stability may refer to the presence of one or/two fivemembered rings [31].…”

Section: 35mentioning

confidence: 99%

“…• C is assigned to the elimination of 2C 2 H 5 OH groups from the ligand accompanied by weight loss (% experimental weight 11.37; calculated weight 11.11) [31]. The third step (350.…”

Section: 35mentioning

confidence: 99%

Synthesis, characterization and thermal behavior of some Zn(II) complexes with ligands having 1,3,4‐thiadiazole moieties

Turan

Şekerci

2010

Heteroatom Chemistry

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Some new zinc(II) complexes of the type [Zn(L1)2(C2H5OH)2]·C2H5OH, [Zn(L2)2 Cl2]·H2O, and [Zn2(L3)2(H2O)4Cl4], where HL1 = N‐[5′‐amino‐2, 2′‐bis(1,3,4‐thiadiazole)‐5‐yl]‐2‐hydroxybenzaldehyde imine, L2 = N‐(5‐ethyl‐1,3,4‐thiadiazole‐2‐yl)tereph‐ thalaldehyde imine, and L3 = N,N′‐bis[5‐(4‐nitro phenyl)‐1,3,4‐thiadiazole‐2‐yl]terephthalaldehydedii‐ mine have been synthesized and characterized by IR, 1H NMR spectra, elemental analyses, magnetic susceptibility, UV–vis. and thermogravimetry‐differential thermal analysis (TGA‐DTA). On the basis of electronic spectral studies, an octahedral environment around the Zn(II) ion has been suggested. 1H NMR spectra of the metal complexes of ligands were found to be in agreement with the proposed stoichiometry. The presence of water molecules and ethanol in the Zn(II) complexes is also indicated by the thermal studies. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:14–23, 2010; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/hc.20572

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Synthesis and spectroscopic characterization of new mono- and binuclear complexes of some NH(1) thiosemicarbazides

Cited by 58 publications

References 40 publications

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Syntheses, crystal structures and antibacterial activities of azido-bridged cobalt(III) complexes with Schiff bases

Synthesis, characterization and thermal behavior of some Zn(II) complexes with ligands having 1,3,4‐thiadiazole moieties

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