Synthesis, properties and thermal studies of oxorhenium(V) complexes with 3-hydrazino-5,6-diphenyl-1,2,4-triazine, benzimidazolethione and 2-hydrazinobenzimidazole

Mashaly, Mahmoud M.; El‐Shafiy, Hoda F.; El-Maraghy, Salah B.; Habib, Hesham A.

doi:10.1016/j.saa.2004.06.056

Cited by 20 publications

(14 citation statements)

References 59 publications

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“…(2) The signals observed in the ranges 9.20-13.65, 7.09-10.46, and 7.08-9.97 ppm may be assigned to NH, HC=N, and aromatic protons, respectively. In case of complexes 5, 13, 14, and 15 new signals observed in the range 10.75-11.08 ppm (complexes 5 and 13), at 10.04 (complex 14), and 11.0 ppm (complex 15) that may be assigned to the coordinated OH groups of the 8-hydroxyquinoline [71] and salicylaldehyde and NH 2 group of glycine moieties [15] supporting the formation of ternary complexes. Finally, the absence of OH protons (hydrated H 2 O) may be due to their replacement by DMSO-d 6 molecules [50,65].…”

Section: H and 13 C Nmr Spectramentioning

confidence: 98%

“…Greater stability of the ligands compared with their complexes suggests a powerful intramolecular H-bonding in the ligands [81,82]. Complexes 1,6,8,14,15, and 16 were taken as representative examples for thermal analysis. The results of thermal analysis of the complexes ( Table 2) are in good agreement with the theoretical formulae as suggested from elemental analyses.…”

Section: Thermal Analysismentioning

confidence: 99%

“…Mixed-ligand complexes have been extensively studied following recognition that they play an important role in biological processes and serve as suitable models for valuable information in the elucidation of enzymatic processes of biological relevance [7,8]. Also, these complexes showed significant antibacterial, antifungal, and anticancer activity [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Shebl

Khalil

2014

Monatsh Chem

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Two pentadentate carbohydrazone ligands, H 2 L 1 and H 2 L 2 , were prepared by the reaction of the bifunctional compound carbohydrazide with 2-hydroxy-5-nitrobenzaldehyde and 2-hydroxy-1-naphthaldehyde, respectively. Reactions of the ligands with oxovanadium(IV), cerium(III), thorium(IV), and dioxouranium(VI) ions yielded binary complexes. Reactions of the ligands with the dioxouranium(VI) ion in the presence of secondary ligands (8-hydroxyquinoline, glycine, salicylaldehyde, or benzoylacetone) yielded ternary complexes. The ligands and metal complexes were characterized by different techniques such as elemental and thermal analyses, IR, 1 H and 13 C NMR, electronic, ESR, mass spectra, and powder XRD as well as magnetic susceptibility and conductivity measurements. The coordinating sites are phenolic oxygen, azomethine nitrogen, and carbonyl oxygen. In complexes, the ligands act as dibasic pentadentate except ternary dioxouranium(VI) complexes, obtained using glycine or benzoylacetone, in which the ligands act as monobasic pentadentate. The XRD patterns for the H 2 L 1 ligand, its binary dioxouranium(VI) complex, and its 8-hydroxyquinoline ternary complex indicate crystalline nature and the grain size was estimated. The H 2 L 1 ligand and its binary complex have triclinic systems while the ternary complex has a monoclinic system with different unit-cell parameters. The ligands and some of their metal complexes showed antimicrobial activity toward some Gram-positive and Gram-negative bacteria, yeast (Candida albicans), and fungus (Aspergillus fumigatus), and MIC values were determined. The DNA binding properties of the oxovanadium(IV) complexes of H 2 L 1 and H 2 L 2 ligands were investigated by electronic absorption spectroscopy and viscosity measurements. The results indicated that these complexes bind to DNA via an intercalation binding mode with an intrinsic binding constant K b of 2.55 9 10 4 and 3 9 10 4 M -1 , respectively.

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Section: H and 13 C Nmr Spectramentioning

confidence: 98%

Section: Thermal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Shebl

Khalil

2014

Monatsh Chem

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“…On the other hand, the bands observed in the 1503-1561 cm -1 range of the C=N (phenanthroline ring) and C=C (Ar) groups were shifted to higher frequencies in the range 1522-1577 cm -1 in all the complexes of the ligand, that indicates the participation nitrogen atom of the C=N (phenanthroline ring) groups in coordination of the metal ion [31,32].…”

Section: Ir Spectramentioning

confidence: 95%

Synthesis, characterization and antibacterial activity of 2-p-tolyl-1H-imidazo[4,5-f][1,10] phenanthroline and its Co(II), Ni(II) and Cu(II) complexes

Gomleksiz¹,

Alkan²,

Erdem³

2013

Bull. Chem. Soc. Eth.

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ABSTRACT. In this study, the ligand, 2-p-tolyl-1H-imidazo[4,5-f][1,10]phenanthroline (L) was synthesized by the reaction of 1,10-phenanthroline-5,6-dione with 4-methylbenzaldehyde. The complexes of L were prepared with Co(II), Ni(II) and Cu(II) chlorides. The ligand and its complexes were characterized by IR, UV/VIS, 1 H NMR, TGA, elemental analyses, molar conductivity and magnetic susceptibility. The complexes were proposed to be distorted octahedral geometry. Antibacterial activity of the ligand and its complexes were tested against selected bacteria. The minimum inhibitory concentration (MIC) was determined for the ligand and its complexes.

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“…The mixture was cooled. The solid obtained was filtered off and crystalized from ethanol to give yellowish crystals [18] Diffraction data of compounds 1-3 were collected on Oxford Diffraction SuperNova (single source at offset) Eos diffractometer equipped with a graphite-monochromatic CuK α radiation at 296 K. The structures were solved by direct methods using SHELXS-97 and refined by full-matrix least-squares method using SHELXL-97 [19]. All non-hydrogen atom parameters were refined anisotropically and all H atoms except for H atoms bonded nitrogen atoms were refined using a riding model with C-H distances of 0.93 Å. H atoms bonded nitrogen atoms were located in a difference map and refined freely.…”

Section: (56-diphenyl-[124]triazin-3-yl)-hydrazine (2)mentioning

confidence: 99%

Synthesis, spectroscopic (UV–vis and GIAO NMR), crystallographic and theoretical studies of triazine heterocyclic derivatives

Khan

Obaid

Al-Harbi

et al. 2015

Journal of Molecular Structure

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, Synthesis, spectroscopic (UV-vis and GIAO NMR), crystallographic and theoretical studies of triazine heterocyclic derivatives, Journal of Molecular Structure (2015), doi: http://dx.doi.org/ 10. 1016/j.molstruc.2015.04.036 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Synthesis, properties and thermal studies of oxorhenium(V) complexes with 3-hydrazino-5,6-diphenyl-1,2,4-triazine, benzimidazolethione and 2-hydrazinobenzimidazole

Cited by 20 publications

References 59 publications

Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Synthesis, characterization and antibacterial activity of 2-p-tolyl-1H-imidazo[4,5-f][1,10] phenanthroline and its Co(II), Ni(II) and Cu(II) complexes

Synthesis, spectroscopic (UV–vis and GIAO NMR), crystallographic and theoretical studies of triazine heterocyclic derivatives

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