ChemInform Abstract: Dehydroacetic Acid Based Schiff′s Bases and Their Metal Complexes: A Review

ChemInform ◽  
2016 ◽  
Vol 47 (28) ◽  
Author(s):  
A. K. Gupta ◽  
R. Pal
Keyword(s):  
Metal Complexes ◽  
Dehydroacetic Acid

The formation constants of some metal complexes with 3-Acetyl-4-hydroxycoumarin, dehydroacetic acid, and their oximes

1971 ◽  
Vol 24 (5) ◽  
pp. 925 ◽  
Author(s):  
GCS Manku
Keyword(s):  
Metal Complexes ◽  
Sodium Perchlorate ◽  
Formation Constants ◽  
Ionic Concentration ◽  
Dehydroacetic Acid ◽  
Nitrogen Donors ◽  
Oxygen Donors

The formation constants (K1, K2, and β2) of the complexes of 3-acetyl-4- hydroxycoumarin (ahc) and dehydroacetic acid (dha) and their respective oximes, ahco and dhao, with iron(II), cobalt(II), nickel(II), copper(II), zinc(II), calcium(II), magnesium(II), cadmium(II), dioxouranium(VI), iron(III), aluminium(III), scandium(III), indium(III), yttrium(III), and lanthanon(III) ions (lanthanum to lutetium inclusive with the exception of promethium) have been determined pH-metrically at 35� in 50% v/v aqueous dioxan medium with 0.100M sodium perchlorate as the constant ionic concentration, using Calvin and Wilson's pH-metric technique. The trends in the formation constants of these complexes are discussed. It is observed that, except in the case of Co2+, Ni2+, and Cu2+ ions, for which chelation through nitrogen donors is more favoured, all other ions prefer coordination through oxygen donors.

scholarly journals Synthesis and Structural Studies of Transition Metal Complexes with Bidentate Schiff Base Derived from 3-Acetyl-6-methyl-(2H)-pyran-2,4(3H)-dione

2011 ◽  
Vol 8 (s1) ◽  
pp. S245-S252 ◽  
Author(s):  
Praveen S. Mane ◽  
Sanjiv M. Salunke ◽  
Balagi S. More
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Octahedral Geometry ◽  
Ligand Field ◽  
Schiff Base Ligands ◽  
H Nmr ◽  
Dehydroacetic Acid ◽  
Ligand Field Parameters

The solid complexes of Cu(II), Ni(II), Co(II), Mn(II) and Fe(III) with Schiff base ligands derived from heterocyclic compounds 3-acetyl-6-methyl-(2H)-pyran-2,4(3H)-dione (Dehydroacetic acid) ando-chloroaniline were synthesized and characterized by elemental analysis, conductance, magnetic, thermal, UV-Vis and1H-NMR spectroscopy. The ligand field parameters have been evaluated for Cu(II), Ni(II), Co(II), Mn(II) and Fe(III) complexes which suggest an octahedral geometry for each of them. The magnetic moment and spectral data suggest the dimeric nature of Mn(II) complexes with octahedral geometry. The fungicidal activities of the ligands and their metal complexes have been screened in vitro againstAspergillus nigerand the percentage inhibition of the metal complexes is found to be increased considerably then that of their corresponding ligands and the order is Cu>Ni>Fe>Mn>Co.

Electronic structure and vibrational frequencies in dehydroacetic acid (DHA) transition-metal complexes: A DFT study

2010 ◽  
Vol 945 (1-3) ◽  
pp. 78-84 ◽  
Author(s):  
Fairouz Zouchoune ◽  
Saber-Mustapha Zendaoui ◽  
Naïma Bouchakri ◽  
Amel Djedouani ◽  
Bachir Zouchoune
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Vibrational Frequencies ◽  
Dft Study ◽  
Dehydroacetic Acid

scholarly journals Transition metal complexes with oxygen donor ligands: A synthesis, spectral, thermal and antimicrobial study

2008 ◽  
Vol 73 (11) ◽  
pp. 1073-1082 ◽  
Author(s):  
Vaibhav Patange ◽  
Rajendra Pardeshi ◽  
Balasaheb Arbad
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Measurements ◽  
Molar Conductance ◽  
Donor Ligands ◽  
Curvularia Lunata ◽  
Dehydroacetic Acid ◽  
Oxygen Donor ◽  
Vis Spectroscopy

Transition metal complexes of chalcones derived from the condensation of 3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione (dehydroacetic acid) and p-methoxybenzaldehyde (HL1) or p-nitrobenzaldehyde (HL2) were synthesized and characterized by elemental analysis, conductometry, thermal analysis, magnetic measurements, IR, 1H-NMR, UV-Vis spectroscopy and a microbial study. From the analytical and thermal data, the stoichiometry of the complexes was found to be 1:2 (metal: ligand). The molar conductance data revealed that all the metal chelates were non-electrolytes. The thermal stability of the complexes was studied by thermogravimetry and the decomposition schemes of the complexes are given. The ligands and their metal complexes were screened for antibacterial activity against Staphylococcus aureus and Escherichia coli, and fungicidal activity against Aspergillus flavus, Curvularia lunata and Penicillium notatum.

scholarly journals Synthesis, Characterization, Thermal Studies, and Molecular Structure of New Metal Complexes of Dehydroacetic Acid Hydrazone

2016 ◽  
Vol 12 (3) ◽  
pp. 266
Author(s):  
Tahani I. Kashar ◽  
Amal H. El-Sehli
Keyword(s):  
Molecular Structure ◽  
Metal Complexes ◽  
Crystal And Molecular Structure ◽  
Thermal Studies ◽  
Spectral Studies ◽  
Planar Geometry ◽  
Dehydroacetic Acid ◽  
Phenolic Oxygen ◽  
Physical Chemical ◽  
Square Planar

Metal complexes of dehydroacetic acid hydrazone are synthesized and characterized by physical, chemical, and spectral studies. The ligand behaves as monobasic tetradentate coordinated with the metal ions through C=O, deprotonated phenolic oxygen, and azomethin nitrogen. The characterization data suggests a square planar geometry for Cu(II) complex and an octahedral geometry for all other complexes. The crystal and molecular structure of the [Cu(HL)]Cl.H2O complex has been established by a single crystal maXus. The thermal studies of the complexes showed that the decomposition takes place through four steps.

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