Coordination of carbonyl oxygen in the complexes of polymeric N-crotonyl-2-hydroxyphenylazomethine

Al-Jeboori, Mohamad J.; Al-Dujaili, Ammar H.; Al-Janabi, Alyaa E.

doi:10.1007/s11243-008-9165-9

Cited by 27 publications

(35 citation statements)

References 19 publications

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“…The differences between the asymmetric and symmetric vibration of -COO -group for both amino acids in all complexes is laying between 164-206 cm -1 . This is in accordance with results indicated the carboxylate group coordinated to a metal ion in a monodentate fashion 11 . The spectra of complexes indicated peaks around ca.…”

Section: Ft-ir Spectrasupporting

confidence: 92%

Mixed Ligand Complexes Derived from Isoniazid and Amino Acid: Preparation, Characterization and Anti-tuberculosis Assay

Al-Juboori¹

2017

Orient. J. Chem

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A range of mixed ligand complexes derived from the reaction of alanine (alan), glycine (gly)and isoniazid (ison) ligands with Cr ) and Ni +2 , w = 0, n = 3, Y = 2Cl).The analyses data indicated distorted octahedral geometries about metal centres. The bio-assay of the prepared complexes show a positive activity against normal tuberculosis bacteria. However, the complexes exhibit no activity against the resistance tuberculosis bacteria.

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Section: Ft-ir Spectrasupporting

confidence: 92%

Mixed Ligand Complexes Derived from Isoniazid and Amino Acid: Preparation, Characterization and Anti-tuberculosis Assay

Al-Juboori¹

2017

Orient. J. Chem

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“…The doublet at 7.4 ppm is assigned to protons of aromatic ring. The appearance of these protons as a doublet is due to mutual coupling [15]. The 1 H and 13 C NMR spectra of H 2 L show the other expected signals.…”

Section: Resultsmentioning

confidence: 75%

“…Furthermore, metal complexes of chromium, manganese, nickel, copper, zinc and ruthenium with a wide variety of Schiff-bases have been used as catalysts for carbonylation, hydrogenation, hydroformylation and epoxidation reactions [13,14]. Recently, we reported some metal complexes of a polymer derived from the N-crotonyl-2-hydroxyphenylazomethine Schiff-base [15]. The ligand has been specifically designed in which the oxygen atom of the carbonyl moiety is coordinated to metal centre and results in the formation of ladder-type structures.…”

Section: Introductionmentioning

confidence: 99%

Formation of polymeric chain assemblies of transition metal complexes with a multidentate Schiff-base

Al-Jeboori

Hasan

Al-Sa’idy

2009

Transition Met Chem

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The new multidentate Schiff-base (E)-6, 6 0 -((1E,1 0 E)-(ethane-1,2-diylbis(azan-1-yl-1-ylidene))bis-(methan-1-yl-ylidene))bis(4-methyl-2-((E)(pyridine-2-ylmethylimino)methyl)phenol) H 2 L and its polymeric binuclear metal complexes with Cr(III), Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) are reported. The reaction of 2,6-diformyl-4-methyl-phenol with ethylenediamine in mole ratios of 2:1 gave the precursor 3,3 0 -(1E,1 0 E)-(ethane-1,2-diylbis(azan-1-yl-1ylidene))bis-(methan-1-yl-1-ylidene)bis(2-hydroxy-5-methylbenzaldehyde) W. Condensation of the precursor with 2-(amino-methyl)-pyridine in mole ratios of 1:2 gave the new N 6 O 2 multidentate Schiff-base ligand H 2 L. Upon complex formation, the ligand behaves as a dibasic octadentate species with the involvement of the nitrogen atoms of the pyridine groups in coordination for all complexes. The mode of bonding and overall geometry of the complexes were determined through physico-chemical and spectroscopic methods. These studies revealed octahedral geometries for Cr(III),

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“…This can be attributed to delocalisation of metal electron density (t2g) to the π-system of the ligand, 25 indicating coordination of oxygen of C=O and nitrogen of the C=N moieties to the metal atoms. 26 The IR spectra of the ligands display two sharp bands around 3230-3200 cm -1 and 3455-3380 cm -1 assignable to sym and asym vibrations of the NH2 group, respectively.…”

Section: Table 1 Analytical Data and Physical Properties Of The Ligamentioning

confidence: 99%

Microwave Assisted Synthesis, characterization and biological studies of isonicotinoylhydrazones and their Manganese (II) complexes

Punjabi¹,

Gurjar²,

Ameta³

et al. 2018

ECB

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The Schiff base ligands 1-(2-furanyl) ethanone isonicotinoylhydrazone (L 5 H), 1-(2-thienyl)ethanone isonicotinoylhydrazone (L 6 H), 1-(2-pyridyl)ethanone isonicotinoylhydrazone (L 7 H), 1-(2-naphthyl)ethanone isonicotinoylhydrazone (L 8 H), were prepared by the condensation reaction of isonicotinic acid hydrazide with corresponding ethanons in 1:1 molar ratio, respectively, in ethanol under microwave exposure. The Mn (II) complexes have been prepared by mixing MnCl2.4H2O in 1:1 and 1:2 molar ratios with monofunctional bidentate ligands. The structure of the ligands and their transition metal complexes were confirmed by the elemental analysis, molecular weight determinations, IR, electronic and EPR spectral studies. On the basis of these studies it is clear that the ligands coordinated to the metal atom in a monobasic bidentate mode, by O ∩ N donor system. Thus a tetrahedral environment around the Mn(II) ion has been proposed. The antimicrobial activity of Schiff base ligands and their respective Mn(II) complexes were tested against some of pathogenic bacterial and fungal strains. The results indicated that the complexes showed higher activity than the parent ligands. *Corresponding Authors

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Coordination of carbonyl oxygen in the complexes of polymeric N-crotonyl-2-hydroxyphenylazomethine

Cited by 27 publications

References 19 publications

Mixed Ligand Complexes Derived from Isoniazid and Amino Acid: Preparation, Characterization and Anti-tuberculosis Assay

Mixed Ligand Complexes Derived from Isoniazid and Amino Acid: Preparation, Characterization and Anti-tuberculosis Assay

Formation of polymeric chain assemblies of transition metal complexes with a multidentate Schiff-base

Microwave Assisted Synthesis, characterization and biological studies of isonicotinoylhydrazones and their Manganese (II) complexes

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