Thermodynamics of metal complex formation in aqueous melts of calcium dinitrate–ammonium nitrate. Part 2. Cadmium(II) bromides

1978 ◽  
pp. 549-552 ◽  
Author(s):  
István J. Zsigrai ◽  
Ivan J. Gal ◽  
Ružica M. Nikolić
Keyword(s):  
Complex Formation ◽  
Metal Complex ◽  
Ammonium Nitrate

scholarly journals Metal Complex Formation in Melts of Acetamide-Ammonium Nitrate-Water Mixtures, Part I. Cobalt(II) Chloride Complexes

2005 ◽  
Vol 60 (3) ◽  
pp. 201-206 ◽  
Author(s):  
István J. Zsigrai ◽  
Slobodan B. Gadžurić ◽  
Borko Matijević
Keyword(s):  
Complex Formation ◽  
Absorption Coefficient ◽  
Metal Complex ◽  
Ammonium Nitrate ◽  
Absorption Maximum ◽  
Chloride Concentration ◽  
Chloride Ions ◽  
Chloride Complexes ◽  
Distorted Octahedral ◽  
The Stability

The complex formation between cobalt(II) and chloride ions in molten NH4NO3・2.61H2O, NH4NO3・CH3CONH2・1.61H2O and NH4NO3・2.61CH3CONH2 has been investigated. Absorption spectra of cobalt(II) chloride containing variable amounts of ammonium chloride were recorded at 45 to 60 °C. In the absence of chloride, the solutions show spectra typical for octahedral co-ordination of cobalt(II). Addition of chloride caused a shift of the absorption maximum toward lower energies and an increase of the molar absorption coefficient with increasing chloride concentration. The position of the absorption maximum and the intensity of the absorption indicate tetrahedral or severely distorted octahedral co-ordination. The stability constants for [Co(NO3)4]2−, [Co(NO3)2Cl2]2− and [CoCl4]2− complex formation in NH4NO3・2.61CH3CONH2 are reported.

Metal template reactions. XV. The scope of macrocyclic metal complex formation from malonamido dicarbonyl precursors

1983 ◽  
Vol 36 (6) ◽  
pp. 1133 ◽  
Author(s):  
DSC Black ◽  
H Blatt ◽  
Vanderzlam CH Bos ◽  
AJ Liepa
Keyword(s):  
Complex Formation ◽  
Metal Complex ◽  
Membered Ring ◽  
Dicarbonyl Compounds ◽  
Macrocyclic Nickel

The malonamido dicarbonyl compounds (4)-(6), (8), (13), (15) and (16) have been prepared as potential precursors of macrocyclic nickel(11) complexes. Such complexes could only be formed successfully from the dimethylmalonyl derivative (4). The benzylidene-substituted benzophenone derivatives (15) and (16) underwent a metal-promoted pinacol reaction to yield compounds (17) and (18) containing an 11-membered ring.

Sign in / Sign up

Export Citation Format

Share Document