Synthesis, spectroscopic and thermal studies on ruthenium(III), rhodium(III) and iridium(III) complexes with hydrazones derived from 2,6-diacetylpyridine and different aromatic hydrazides

Sharma, V. K.; Pandey, O.P.; Sengupta, S. K.; Halepoto, Dost Muhammad

doi:10.1007/bf01098225

Cited by 21 publications

(5 citation statements)

References 16 publications

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“…In the spectra of the complexes, this band appeared at a lower frequency (D = 10-25 cm -1 ) at 1595-1610 cm -1 , indicating coordination of the nitrogen atom of Schiff base to the metal. 27,28 If the Schiff bases coordinated via the nitrogen atom, a reduction in the >(C=N) frequency, due to a lowering of the electron density upon coordination, is to be expected. There is, however, a tendency of this band of Schiff base ligands of aromatic diamines to shift to lower frequencies on coordination to the metal than occurs with those of aliphatic diamines.…”

Section: Infrared Spectramentioning

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: Infrared Spectramentioning

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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“…14,15 In addition, their inherent keto-enol tautomerism associated with the coordination through either nitrogen or oxygen, or both, greatly diversifies their coordination chemistry, increasing the importance of a deep knowledge of their behaviour. 16 For instance, tautomerism directly affects the chromatographic behaviour and solubility of their complex with metal ions. 17 At least three geometric forms have been found to coexist in aqueous solution for dap hydrazone derivatives.…”

Section: Introductionmentioning

confidence: 99%

Condensed, solution and gas phase behaviour of mono- and dinuclear 2,6-diacetylpyridine (dap) hydrazone copper complexes probed by X-ray, mass spectrometry and theoretical calculations

Neto

Viana²,

Rodrigues

et al. 2013

Dalton Trans.

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We describe the synthesis of novel mononuclear and dinuclear copper complexes and an investigation of their behaviour in solution using mass spectrometry (ESI-MS and ESI-MS/MS) and in the solid state using X-ray crystallography. The complexes were synthesized from two widely used diacetylpryridine (dap) ligands, i.e. 2,6-diacetylpyridinebis(benzoic acid hydrazone) and 2,6-diacetylpyridinebis(2-aminobenzoic acid hydrazone). Theoretical calculations (DFT) were used to predict the complex geometries of these new structures, their equilibrium in solution and energies associated with the transformations.

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“…Metal complexes of X,N,N,N,X-pentadentate (X = O, S) Schiff base ligands derived from semicarbazones, thiosemicarbazones, and S -alkyldithiosemicarbazates comprise important classes of compounds because of their interesting physicochemical properties and potential relevance in biological systems. − In this context, a number of 3d metal complexes have been extensively studied by X-ray structural analysis and a number of other spectroscopic techniques. , However, organotin(IV) complexes of these classes of compounds have received less attention…”

Section: Introductionmentioning

confidence: 99%

X-ray Crystallographic and Mössbauer Spectroscopic Applications in Dependence of Partial Quadrupole Splitting, [R], on the C−Sn−C Angle in Seven-Coordinated Diorganotin(IV) Complexes

et al. 2006

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The synthesis and the IR, NMR (1H, 13C, and 119Sn), and Mössbauer spectroscopies and single-crystal X-ray diffraction studies of seven-coordinated diorganotin(IV) complexes, namely, [Ph2Sn(Hdapsc)]Cl.H2O.DMF [7; H(2)dapsc = 2,6-diacetylpyridine bis(semicarbazone)], [Me(2)Sn(H2,6Achexim)]Br.H2O [8; H(2)2,6Achexim = 2,6-diacetylpyridine bis(3-hexamethyleneiminylthiosemicarbazone)], [Me(2)Sn(dapmts)] [9; H(2)dapmts = 2,6-diacetylpyridine bis(4-methythiosemicarbazone)], and [nBu2Sn(dapmdtc)] [10; H(2)dapmdtc = 2,6-diacetylpyridine bis(S-methydithiocarbazate)], were done. The determination of the structures of [Ph(2)Sn(Hdapsc)]+, [Me2Sn(H2,6Achexim)]+ and [Me2Sn(dapmts)], [nBu2Sn(dapmdtc)] revealed the presence of monocationic and neutral complexes, respectively. The structures consist of monomeric units in which the Sn(IV) ions exhibit distorted pentagonal-bipyramidal geometries, with the X,N,N,N,X-donor (X = O, S) systems of the ligands lying in the equatorial plane and the organic groups in the apical positions. The C-Sn-C angle in the seven-coordinated diorganotin(IV) complexes was estimated using a correlation between Mössbauer and X-ray data based on the point-charge model and using new values obtained in this work for [alkyl] = -1.00 mm s(-1) and [aryl] = -0.80 mm s(-1) for complexes containing O,N,N,N,O-pentadentate ligands and new values for [alkyl] = -0.87 mm s(-1) and [aryl] = -0.75 mm s(-1) for complexes containing S,N,N,N,S-pentadentate ligands.

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Synthesis, spectroscopic and thermal studies on ruthenium(III), rhodium(III) and iridium(III) complexes with hydrazones derived from 2,6-diacetylpyridine and different aromatic hydrazides

Cited by 21 publications

References 16 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

Condensed, solution and gas phase behaviour of mono- and dinuclear 2,6-diacetylpyridine (dap) hydrazone copper complexes probed by X-ray, mass spectrometry and theoretical calculations

X-ray Crystallographic and Mössbauer Spectroscopic Applications in Dependence of Partial Quadrupole Splitting, [R], on the C−Sn−C Angle in Seven-Coordinated Diorganotin(IV) Complexes

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