scholarly journals COORDINATION COMPOUNDS OF COPPER, COBALT AND NICKEL FORMATES WITH FORMAMIDE AND CARBAMIDE

2020 ◽  
pp. 17-21
Keyword(s):  
Coordination Compounds ◽  
Metal Content ◽  
Central Atom ◽  
Mixed Ligand ◽  
Molecular Formula ◽  
Ligand Coordination ◽  
Stretching Vibrations ◽  
Coordinated Water ◽  
Derivatographic Analysis ◽  
Cobalt And Nickel

The synthesis of mixed ligand coordination compounds of copper, cobalt and nickel formates with formamide and urea in an aqueous solution was carried out. The metal content in the complexes was determined by complexometric titration. Using IR spectroscopy, it was proved that the coordination of formamide and urea with the complexing atom is carried out through the oxygen atom of the carbonyl group. The absorption spectrum of coordinated water is also present in the IR spectrum. The nature of the change in the frequency of stretching vibrations of the –OH group in the composition of water indicates its location in the nearest coordination sphere of the central atom. Derivatographic analysis investigated the thermal behavior of the obtained compounds. Based on the nature of the heating curves, sequential cleavage of water and ligands is shown and a molecular formula for synthesized compounds is proposed. The equation of the synthesis reaction of these coordination compounds is also given.

Thiocyanate bond mode determination on solid manganese(II) mixed ligand coordination compounds

1994 ◽  
Vol 349 (1-3) ◽  
pp. 228-230
Author(s):  
H. B�hland ◽  
G. K�nig ◽  
I. Berg ◽  
H. Umbreit
Keyword(s):  
Coordination Compounds ◽  
Mixed Ligand ◽  
Ligand Coordination

scholarly journals Crystal Structures, Hirshfeld Surfaces, and Thermal Study of Isostructural Polymeric Ladders of La(III) and Sm(III) Coordination Compounds with 4,4’-Bipyridine and Dibromoacetates

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4274
Author(s):  
Agnieszka Czylkowska ◽  
Anna Pietrzak ◽  
Małgorzata Szczesio ◽  
Bartłomiej Rogalewicz ◽  
Jakub Wojciechowski
Keyword(s):  
Crystal Structures ◽  
Coordination Compounds ◽  
Central Atom ◽  
Thermal Study ◽  
Hirshfeld Surface ◽  
Mixed Ligand ◽  
Enrichment Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hirshfeld Surfaces

Two novel mixed ligand complexes with general formula [M2(4,4′-bpy)1.5(CBr2HCOO)6(H2O)2]n (where 4,4′-bpy = 4,4′-bipyridine) were synthesized. Thermal analysis was used to describe a solid intermediate and final products of thermolysis. A coupled TG-MS system was used to monitor principal volatile fragments evolved during pyrolysis. Crystal structures of the complexes were determined. Cationic dinuclear M2 (M(III) = La, Sm) coordination cores were obtained. Both crystal structures are isostructural. Single crystal X-ray diffraction analysis revealed that investigated structures of 1D coordination polymers assembled in ladder-like systems. The central atom replacement resulted in unit cell identity parameter П = 0.0091. Additionally, the isostructurality of the reported La(III) and Sm(III) complexes was revealed using Hirshfeld Surface analysis supported by Enrichment Ratio calculations.

scholarly journals Green synthesis of thioxoimidazolidine derivative ligand: Spectroscopic, thermal and biological assignments of new Cu(II), Co(II), and Ni(II) chelates in neutral system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abeer M. Alosaimi ◽  
Hosam A. Saad ◽  
Moamen S. Refat ◽  
Ghaferah H. Al-Hazmi
Keyword(s):  
Metal Complexes ◽  
Molar Conductance ◽  
Molecular Formula ◽  
Neutral System ◽  
H Nmr ◽  
Different Types ◽  
Coordinated Water ◽  
C Nmr ◽  
Octahedral Configuration ◽  
Cobalt And Nickel

Abstract Eco-friendly synthesis of ethyl 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate (4) ligand (L) using microwave irradiation technique was described. The structure of thioxoimidazolidine derivative ligand compound has been established based on different types of analyses such as infrared, 1H-NMR, 13C-NMR, and mass spectra as well as elemental analysis. The copper, cobalt, and nickel(II) complexes with molecular formula [M(L)(H2O)4]Cl2 (where M = Co(II), Ni(II), and Cu(II), L = thioxoimidazolidine derivative ligand), have been prepared and well-characterized using microanalytical, conductivity measurements, magnetic, spectroscopic, and physical analyses. Upon the outcome results of analyses, the stoichiometry of the synthesized complexes is 1:1 (M:L). The molar conductance values concluded that the behavior of metal complexes was electrolytes. The 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate chelate acts as a monovalent bidentate fashion via nitrogen and oxygen atoms of both thioxoimidazolidine and propanoate ester moieties. The geometric structures of the synthesized metal complexes are an octahedral configuration based on spectroscopic and magnetic moment studies. The thermogravimetric assignments deduced that the presence of four coordinated water molecules. The synthesized copper(II), cobalt(II), and nickel(II) complexes were biologically checked against G+ and G- bacteria and two species of fungi (Aspergillus Nigaer, and Penicillium Sp.).

scholarly journals Synthesis, Structure and Application of Mixed-Ligand Coordination Compounds of Copper(II) with Substituted Thioamides

2020 ◽  
Vol 14 (1) ◽  
pp. 55-61
Author(s):  
Anatoliy Ranskiy ◽  
◽  
Olga Gordienko ◽  
Natalia Didenko ◽  
Taras Titov ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Mixed Ligand ◽  
Ligand Coordination
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