Chelate formation by hydrazones

Shawali, Ahmad S.; Aboutabl, M. A.; Fahmy, H. M.; Mazzah, Ahmed; Osei-Twum, Emanuel Y.; Abbas, Nureddin M.

doi:10.1007/bf02910747

Cited by 11 publications

(2 citation statements)

References 16 publications

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“…In the IR spectrum of complex 5, shifting to higher wavenumber (12 cm À1 ) of the CO stretching vibration shows that phenolic O donor atoms coordinate to Mn [28,29]. Kinematic coupling of the CO stretching vibration with the Mn-O stretching vibration would increase the wavenumbers.…”

Section: Resultsmentioning

confidence: 97%

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone

Sert

Şentürk

Özdemir

et al. 2004

Journal of Coordination Chemistry

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Five new complexes, [M(CO) 5 (salmsh)] (M ¼ Cr; 1, Mo; 2, W; 3), [Re(CO) 4 Br(salmsh)], 4, and [Mn(CO) 3 (salmsh)], 5, have been synthesized by the photochemical reaction of metal carbonyls with salicylaldehyde methanesulfonylhydrazone (salmsh). The complexes have been characterized by elemental analyses, EI mass spectrometry, FT-IR and 1 H NMR spectroscopy. The spectroscopic studies show that salmsh behaves as a monodentate ligand coordinating via the imine N donor atom in 1-4 and as a tridentate ligand in 5.

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Section: Resultsmentioning

confidence: 97%

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone

Sert

Şentürk

Özdemir

et al. 2004

Journal of Coordination Chemistry

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“…Therefore, a number of hydrazone derivatives have been claimed to possess interesting anticonvulsant, antidepressant, analgesic, antiinflammatory, antiplatelet, antimalarial, antimicrobial, antitumoral and antiviral activities [12][13][14][15][16][17][18][19]. Furthermore, hydrazones can display antitubercular effects based on their tendency to form stable metal chelates with transition metal ions [20], which catalyze the physiological processes [21].…”

Section: Introductionmentioning

confidence: 99%

DETERMINATION OF THE DISSOCIATION CONSTANTS OF SOME p-SUBSTITUTED AROMATIC HYDRAZONES

Jankulovska¹,

Spirevska²,

Ragjenovikj³

2017

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A b s t r a c t: The acid-base behavior of five p-substituted aromatic hydrazones has been studied, using UV spectrophotometric method. The influence of the acidity of the medium on the absorption spectra is followed in aqueous sodium hydroxide solutions in pH region from 7 to 14. The measurements are performed at room temperature, and at ionic strength of 0.1, 0.25 and 0.5 mol dm -3 . A batochromic shift of the absorption band that appears in neutral media is observed, when pH is up to 7. It suggests that the dissociation process of the amide and hydroxyl group takes place. Deprotonation enthalpies and total energy values are calculated by using the semiempirical methods AM1 and PM3. Using the changes in the UV spectra with pH of the solution, the determination of dissociation constants, pK BH , at three different ionic strengths, as well as, the thermodynamic dissociation constants at zero ionic strength, is performed. In order to obtain more precise results, the calculations are made from the absorbance values at four selected wavelengths. Furthermore, the pK BH values were determined graphically from the intercept of the dependence of logI on pH. The results showed that the numerically calculated pK BH values are identical to those graphically obtained.

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Intramolecular short hydrogen bond: the structure of benzenesulphonylhydrazone derivative of salicylaldehyde

1995

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Chelate formation by hydrazones

Cited by 11 publications

References 16 publications

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone

DETERMINATION OF THE DISSOCIATION CONSTANTS OF SOME p-SUBSTITUTED AROMATIC HYDRAZONES

Intramolecular short hydrogen bond: the structure of benzenesulphonylhydrazone derivative of salicylaldehyde

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Chelate formation by hydrazones

Cited by 11 publications

References 16 publications

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)6 (M Cr, Mo, W), Re(CO)5Br, Mn(CO)3Cp] with Salicylaldehyde Methanesulfonylhydrazone

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)6 (M Cr, Mo, W), Re(CO)5Br, Mn(CO)3Cp] with Salicylaldehyde Methanesulfonylhydrazone

DETERMINATION OF THE DISSOCIATION CONSTANTS OF SOME p-SUBSTITUTED AROMATIC HYDRAZONES

Intramolecular short hydrogen bond: the structure of benzenesulphonylhydrazone derivative of salicylaldehyde

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Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone

Synthesis and Characterization of the products from reaction of Metal Carbonyls [M(CO)₆ (M Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with Salicylaldehyde Methanesulfonylhydrazone