Transition-metal complexes of biuret and related ligands. Part I. Biuret complexes of some bivalent metal ions

1967 ◽  
pp. 137 ◽  
Author(s):  
A. W. Mclellan ◽  
G. A. Melson
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bivalent Metal ◽  
Bivalent Metal Ions

Ligand(s)-to-metal charge transfer as a factor controlling the equilibrium constants of late first-row transition metal complexes: revealing the Irving–Williams thermodynamical series

2015 ◽  
Vol 17 (2) ◽  
pp. 805-811 ◽  
Author(s):  
Pradeep R. Varadwaj ◽  
Arpita Varadwaj ◽  
Bih-Yaw Jin
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Equilibrium Constants ◽  
Bivalent Metal ◽  
Metal Charge ◽  
Bivalent Metal Ions ◽  
Metal Charge Transfer

Ligand(s)-to-metal charge transfer obtained from QTAIM charges unravel the Irving–William series for the equilibrium constants of late first-row bivalent metal ions.

Composition and stability of some bivalent transition metal complexes of 3,5-dinitrosalicylic acid

1970 ◽  
Vol 48 (6) ◽  
pp. 1007-1010 ◽  
Author(s):  
S. S. Dube ◽  
S. S. Dhindsa
Keyword(s):  
Transition Metal ◽  
Comparative Study ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Transition Metal Complexes ◽  
Bivalent Metal ◽  
Bivalent Metal Ions ◽  
The Stability ◽  
Bivalent Transition Metal

The interaction of Zn2+, Mn2+, Hg2+, and Cd2+ ions with 3,5-dinitrosalicylic acid was investigated by potentiometric titrations in aqueous 0.1 M KNO3 medium. In all cases the formation of 1:1 complex was indicated. The stability constants in the pH ranges 4.5–8.0, 4.5–8.0, 5.0–8.0, and 5.5–8.0 were determined by applying the Calvin and Melchior's extension of Bjerrum's method and the log K values were found to be 3.70, 2.95, 3.20, and 2.85, respectively. A comparative study of the complexes of 3,5-dinitrosalicylic acid with other bivalent metal ions has also been incorporated. The stability constants of the transition metal complexes obey the order Cu > Ni > Co > Zn > Mn, in agreement with Irving and William's rule.

Synthesis, Characterization and in vitro Biological Evaluation of a New Schiff Base Derived from Drug and its Complexes with Transition Metal Ions

2018 ◽  
Vol 69 (7) ◽  
pp. 1678-1681
Author(s):  
Amina Mumtaz ◽  
Tariq Mahmud ◽  
M. R. J. Elsegood ◽  
G. W. Weaver
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Free Ligand ◽  
Transition Metal Ions ◽  
Biological Evaluation ◽  
Pyridoxal Hydrochloride

New series of copper (II), cobalt (II), zinc (II), nickel (II), manganese (II), iron (II) complexes of a novel Schiff base were prepared by the condensation of sulphadizine and pyridoxal hydrochloride. The ligand and metal complexes were characterized by utilizing different instrumental procedures like microanalysis, thermogravimetric examination and spectroscopy. The integrated ligand and transition metal complexes were screened against various bacteria and fungus. The studies demonstrated the enhanced activity of metal complexes against reported microbes when compared with free ligand.

Studies on complexes of VO(II), Mn(II), Cu(II), Ni(II), Co(II), Zn(II), Fe(III), and UO2(II) with hydrazone β-diketone ligands

1990 ◽  
Vol 68 (5) ◽  
pp. 774-781 ◽  
Author(s):  
Mohamed S. Abdel-Moez ◽  
Shaker L. Stefan ◽  
Mostafa M. El-Behairy ◽  
Mohamed M. Mashely ◽  
Basheir A. El-Shetary
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Metal ◽  
Ir Spectra ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Water Solvent ◽  
Uv Visible

The stepwise stability constants of VO(II), Mn(II), Cu(II), Ni (II), Co(II), Zn(II), Fe(III), and UO2(II) metal ions with 2-(2-acetylphenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dione (2-APHDm), 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA), 2-(2-acetylphenylhydrazone)-1-phenyl-1,3-butane dione (2-APHB), 2-(2-acetylphenylhydrazone)-1,3-diphenyl-1,3-propane dione (2-APHDB), and 3-(2-acetylphenylhydrazone)-1,1,1-trifluoropentane-2,4-dione (2-APHTA) were determined at 30 °C by pH titrations in 75% (v/v) dioxane–water solvent. In addition, metal complexes of three related β-diketones, 2-APHA, 2-APHB, and 2-APHDB have been synthesized and characterized by elemental analysis, uv–visible, ir spectra, and conductance in DMF and magnetic susceptibility measurements. The structure of the complexes have been proposed. Keywords: transition metal complexes of hydrazone-β-diketone ligands.

Structural, photophysical and magnetic properties of transition metal complexes based on the dipicolylamino-chloro-1,2,4,5-tetrazine ligand

2015 ◽  
Vol 44 (19) ◽  
pp. 8855-8866 ◽  
Author(s):  
Iuliia Nazarenko ◽  
Flavia Pop ◽  
Qinchao Sun ◽  
Andreas Hauser ◽  
Francesc Lloret ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes

Tuning structural, luminescence and magnetic properties of the complexes of a chloro-tetrazine-dipicolylamine ligand by coordination to four different metal ions.

Mixed metal complexes in solution. Part 4. Formation and stability of heterobinuclear complexes of cadmium(II)-citrate with some bivalent metal ions in aqueous solution

1985 ◽  
Vol 10 (1) ◽  
pp. 11-14 ◽  
Author(s):  
Paola Amico ◽  
Pier Giuseppe Daniele ◽  
Giorgio Ostacoli ◽  
Guiseppe Arena ◽  
Enrico Rizzarelli ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Metal Complexes ◽  
Bivalent Metal ◽  
Mixed Metal ◽  
Bivalent Metal Ions ◽  
Mixed Metal Complexes

scholarly journals Transition metal complexes of phyllobilins – a new realm of bioinorganic chemistry

2015 ◽  
Vol 44 (22) ◽  
pp. 10116-10127 ◽  
Author(s):  
Chengjie Li ◽  
Bernhard Kräutler
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Photophysical Properties ◽  
Bioinorganic Chemistry ◽  
Transition Metal Ions ◽  
Natural Ligand

Phyllobilins may function as natural ligand molecules for biologically important transition metal ions, giving complexes with remarkable chemical and photophysical properties.

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