ChemInform Abstract: The Thermodynamic Metal-Ligand Stability Constants of Hydroxamic Acids (I) with some Divalent Metal Ions

ChemInform ◽  
1989 ◽  
Vol 20 (47) ◽  
Author(s):  
P. C. PAREKH ◽  
S. K. MANON ◽  
Y. K. AGRAWAL
Keyword(s):  
Metal Ions ◽  
Stability Constants ◽  
Hydroxamic Acids ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Metal Ligand

Dimethyl Phthalate, a Neutral Bidentate Oxygen-Donor Ligand to Divalent Metal Ions

1977 ◽  
Vol 32 (11) ◽  
pp. 1284-1286 ◽  
Author(s):  
W. L. Driessen ◽  
P. L. A. Everstijn
Keyword(s):  
Metal Ions ◽  
Divalent Metal ◽  
Dimethyl Phthalate ◽  
Divalent Metal Ions ◽  
Melting Points ◽  
Bending Vibration ◽  
Donor Ligand ◽  
Oxygen Donor ◽  
Stretching Vibration ◽  
Metal Ligand

A series of new coordination compounds is reported with dimethyl phthalate (MPH) as the ligand, viz. [M(MPH)3](InCl4)2 with M=Mg(II), Ca(II), Mn(II), Fe(II), Co(II), Ni(II), and Zn(II). Each of the metal ions is bonded to three dimethyl phthalate molecules, the six carbonyl oxygens forming a regular octahedron. The carbonyl stretching vibration shifts to lower frequencies, the carbonyl bending vibration shifts to higher frequencies. The magnitudes of the shifts of these vibrations, the frequencies of the metal-ligand vibrations, and the melting points follow the Irving-Williams sequence.

Stability constants and spectral studies of complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid with some divalent metal ions

1984 ◽  
Vol 62 (11) ◽  
pp. 2299-2301
Author(s):  
C. Mahalingam ◽  
J. K. Sthapak ◽  
D. D. Sharma ◽  
R. L. Tiwari ◽  
Smita Sthapak
Keyword(s):  
Carboxylic Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Divalent Metal ◽  
Reflectance Spectra ◽  
Spectral Studies ◽  
Divalent Metal Ions ◽  
The Stability

The stability constants of metal complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid have been determined spectrophotometrically. These follow the Irving–Williams sequence: log KOH(H) = 10.67, log K1(Co) = 9.02, log K1(Ni) = 9.68, log K1(Cu) = 13.37, log K1(Zn) = 7.58, and [Formula: see text]The chelates of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and [Formula: see text] with the dye have been prepared and characterized on the basis of their ir and reflectance spectra.

Studies on some divalent metal α-isosaccharinic acid complexes

2006 ◽  
Vol 94 (6-7) ◽  
Author(s):  
Peter Warwick ◽  
Nick Evans ◽  
Sarah Vines
Keyword(s):  
Radioactive Waste ◽  
Metal Ions ◽  
Stability Constants ◽  
Detrimental Effect ◽  
Divalent Metal ◽  
Intermediate Level ◽  
Divalent Metal Ions ◽  
Organic Complexes ◽  
Intermediate Level Radioactive Waste ◽  
Isosaccharinic Acid

SummaryThe presence of organic complexants, such as α-isosaccharinic acid (ISA) in an intermediate-level radioactive-waste (ILW) repository may have a detrimental effect on the sorption of radionuclides by forming organic complexes in solution. To assess this, stability constants are required for the complexes formed. Constants have been determined for the divalent metal ions, Cd

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