Nickel(II) chelates of Schiff bases derived from isatin and chromone with amino acids and substituted hydrazines

Hassaan, Aly M. A.

doi:10.1007/bf01061934

Cited by 24 publications

(5 citation statements)

References 8 publications

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“…10,11 The complexes of transition metals with Schiff bases show better biological activity than the free ligands. 12 Although there is a wealth of information concerning transition metal complexes with isatin Schiff bases, [13][14][15][16] it is largely confined to the first row metals, such as copper, iron, cobalt, nickel, 17,18 while no study has been reported for complexes with ruthenium, rhodium and iridium. Hence there is a great deal of current interest in the chemistry of these metals, although transition metal complexes of Schiff bases containing the donor sites N 2 O 2 and N 4 have been widely reported.…”

Section: Introductionmentioning

confidence: 99%

Synthetic, structural and antifungal studies of coordination compounds of Ru(III), Rh(III) and Ir(III) with tetradentate schiff bases

Sharma

Srivastava

2006

JSCS

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A series of octahedral Ru(III), Rh(III) and Ir(III) complexes have been prepared with tetradentate Schiff bases derived by condensing isatin with 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, 1,2-diaminobenzene and 1,3-diaminobenzene. The obtained complexes were characterized on the basis of their elemental analyses, magnetic moment, conductance, IR electronic, 1HNMR and FAB mass spectra, as well as thermal analyses. The Ru(III) complexes are low spin paramagnetic, while Rh(III) and Ir(III) behave as diamagnetic complexes. The IR spectral data revealed that all the Schiff bases behave as tetradentate and are coordinated to Ru(III), Rh(III) and Ir(III) via nitrogen and oxygen. Antifungal studies of the ligands as well as their complexes were carried out by the agar plate method.

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Section: Introductionmentioning

confidence: 99%

Synthetic, structural and antifungal studies of coordination compounds of Ru(III), Rh(III) and Ir(III) with tetradentate schiff bases

Sharma

Srivastava

2006

JSCS

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“…Isatin could be synthesized by treating, isatin 2 with 3-substituted -4-amino-5mercapto-1, 2, 4-triazole on reflux in the presence of ethanol and addition of HCl. Pure product was obtained by recrystallization from methanol [54,55]. Similarly, Schiff base of isatin could also be synthesized by refluxing (indol 2,3-dione) with (3-amino-5-phenylpyrazole) in acid-base media of ethanol and acetic acid [56].…”

Section: Isatin Derivativesmentioning

confidence: 99%

Synthesis of Isatin and Its Derivatives and their Applications in Biological System

Aziz

Ullah²,

Ullah³

et al. 2020

BJSTR

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Here investigations were made to study the variant developments in the synthesis of isatin and its derivatives. This review comprehended the various synthetic methods especially, sandmeyer synthesis, stolle synthesis and gassman synthesis for the synthesis of isatin. The isatin and its derivatives played a key role in biomedical applications. The isatin and its derivatives are used as bactericide, fungicide, anti-HIV, anti-epileptic, anti-instigative and so on. The isatin derivatives are helpful in inhibiting the activity of the urease and α-glucosidase enzymes and reduce the risks of pyelonephritis, gastric problems and diabetes. This review highlighted the synthetic routes for the synthesis of isatin and the beneficial aspects of isatin and its derivatives in biomedical field.

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“…In view of the promising importance of isatin derivatives and their related compounds in biological systems [2][3][4] and in continuation to our previous work [5][6] and due to the scarcity of literature on the dielectric properties for this compound, in the present paper we report the dielectric properties of isatomalononitrile as a function of both temperature and frequency.…”

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Dielectric Properties of Isatomalononitrile

Khalil

Hassaan

1993

Acta Phys. Pol. A

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The paper reports dielectric measurements carried out for isatomalononitrile at different temperatures (346 to 383 K) and various frequencies (50 to 5 x 105 Hz). Kramers-Kronig relations are used to ascertain the magnitude of the dc conductivity and to enhance the reliability of dielectric measurements. The analysis of the results shows that there exist certain very slow dielectric phenkena in isatomalononitrile. The frequency dependent conductivity of isatomalononitrile increases approximately linear with frequency. The frequency exponent has the value of 0.5, independent of temperature. PACS numbers: 77.22.-dThe dielectric properties of solids can be described by their complex capacitance defined by the expression where C' and C" are the real and imaginary components of the complex capacitance; C(ω) is the ordinary capacitance, G(ω) is the effective alternating-current conductance and ω is the angular frequency.The complex dielectric permittivity ε* (ω) is related to C* (ω) by a geometrical factor and the corresponding expression for the complex dielectric susceptibility X* may be obtained from ε* (ω) by subtracting the dc contribution σ0 /ω and the "high frequency" permittivitywhere the real and imaginary components of x* (ω) and ε* (ω) are Kramers-Kronig (KK) compatible.In the case of "universal" form of frequency dependence of both X'(ω) and X"(ω) on con -1 , where the value of n being in the range of (0,1), their ratio is independent of frequency [1] (477)

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Nickel(II) chelates of Schiff bases derived from isatin and chromone with amino acids and substituted hydrazines

Cited by 24 publications

References 8 publications

Synthetic, structural and antifungal studies of coordination compounds of Ru(III), Rh(III) and Ir(III) with tetradentate schiff bases

Synthetic, structural and antifungal studies of coordination compounds of Ru(III), Rh(III) and Ir(III) with tetradentate schiff bases

Synthesis of Isatin and Its Derivatives and their Applications in Biological System

Dielectric Properties of Isatomalononitrile

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