Synthesis of Pyridine-2-aldehydesalicylaldazine-3d Metal Complexes and Their Characterization by Magnetic, Spectroscopy and X-Ray Powder Diffraction

1994 ◽  
Vol 24 (2) ◽  
pp. 201-216
Author(s):  
B. Singh ◽  
U. R. Singh
Keyword(s):  
Metal Complexes ◽  
Powder Diffraction ◽  
X Ray ◽  
3D Metal Complexes

scholarly journals Thermal, spectroscopic, X-ray and theoretical studies of metal complexes (sodium, manganese, copper, nickel, cobalt and zinc) with pyrimidine-5-carboxylic and pyrimidine-2-carboxylic acids

2019 ◽  
Vol 138 (4) ◽  
pp. 2813-2837 ◽  
Author(s):  
G. Świderski ◽  
R. Świsłocka ◽  
R. Łyszczek ◽  
S. Wojtulewski ◽  
M. Samsonowicz ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Nitrogen Atom ◽  
Metal Complexes ◽  
General Formula ◽  
Pyrimidine Ring ◽  
Carboxylate Ligand ◽  
Metal Centers ◽  
X Ray ◽  
Carboxylate Oxygen ◽  
3D Metal Complexes

Abstract The new 3d metal complexes of pyrimidine-2-carboxylic (2PCA) and pyrimidine-5-carboxylic (5PCA) acids were synthesized and characterized using thermal analysis (TG–DSC, TG–FTIR), X-ray, spectroscopic (IR, Raman) methods and theoretical (DFT) studies. In the complexes of pyrimidine-2-carboxylic acid of the general formula M(2PCA)2·xH2O (where 2PCA-pyrimidine-2-carboxylate; M = Mn(II), Co(II), Ni(II), Cu(II) and Zn; x = 0 for Mn and Cu; x = 2 for Co, Ni and Zn) coordination of metal ions occurs through nitrogen atom from pyrimidine ring and carboxylate oxygen atom. The complexes of pyrimidine-5-carboxylic acid of the general formula M(5PCA)2·xH2O (where 5PCA—pyrimidine-5-carboxylate; M = Mn(II), Co(II), Ni(II), Cu(II) and Zn; x = 6 for Cu and 4 for remaining complexes) were obtained as monomeric isostructural compounds. Coordination of metal centers occurs through two nitrogen atom from different pyrimidine-5-carboxylate ligand and four oxygen atoms from water molecules. The IR and Raman spectra of free acids as well as obtained metal(II) complexes were described in detail. Aromaticity (HOMA, EN, GEO and I6) of complexes was determined and discussed. The investigated compounds decompose in air in two main stages connected with dehydration and decomposition/burning of anhydrous compounds to the suitable metal oxides. Thermal decomposition in nitrogen leads to the evolution of water, carbon oxides, ammonia and pyrimidine molecules.

scholarly journals Ultrafast inter-ionic charge transfer of transition-metal complexes mapped by femtosecond x-ray powder diffraction

2013 ◽  
Vol 41 ◽  
pp. 05046
Author(s):  
F. Zamponi ◽  
B. Freyer ◽  
V. Juvé ◽  
J. Stingl ◽  
M. Woerner ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Powder Diffraction ◽  
Ionic Charge ◽  
X Ray

scholarly journals Ultrafast inter-ionic charge transfer of transition-metal complexes mapped by femtosecond X-ray powder diffraction

2013 ◽  
Vol 138 (14) ◽  
pp. 144504 ◽  
Author(s):  
Benjamin Freyer ◽  
Flavio Zamponi ◽  
Vincent Juvé ◽  
Johannes Stingl ◽  
Michael Woerner ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Powder Diffraction ◽  
Ionic Charge ◽  
X Ray

scholarly journals Synthesis and X-ray powder diffraction, electrochemical, and genotoxic properties of a new azo-Schiff base and its metal complexes

2014 ◽  
Vol 38 ◽  
pp. 222-241 ◽  
Author(s):  
Mustafa BAL ◽  
Gökhan CEYHAN ◽  
Barış AVAR ◽  
Muhammet KÖSE ◽  
Ahmet KAYRALDIZ ◽  
...  
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Powder Diffraction ◽  
X Ray

scholarly journals Syntheses, structural characterization, and thermal behaviour of metal complexes with 3-aminopyridine as co-ligands

2020 ◽  
Author(s):  
Franz A. Mautner ◽  
Patricia V. Jantscher ◽  
Roland C. Fischer ◽  
Ana Torvisco ◽  
Klaus Reichmann ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Single Crystal ◽  
Powder Diffraction ◽  
Structural Characterization ◽  
Spectroscopic Methods ◽  
X Ray ◽  
Azide Ion ◽  
Polymeric Chains ◽  
Mixed Metal Complexes ◽  
Hydrogen Bonded Systems

Abstract Six mixed metal complexes with 3-aminopyridine (3-ampy) as a co-ligand have been synthesized: catena-{[M(μ2-3-ampy)(H2O)4]SO4·H2O} (M=Ni (1) and Co (2)), [Co(3-ampy)4(NCS)2] (3), [Co(3-ampy)2(NCS)2] (4), [Co(3-ampy)4(N3)2] (5) and mer-[Co(3-ampy)3(N3)3] (6), (NCS−=isothiocyanate ion, N3− azide ion), and characterized by physio-chemical and spectroscopic methods as well as single crystal X-ray and powder diffraction. In the isostructural complexes 1 and 2 single μ2-3-ampy links the Ni(II) and Co(II) centers into polymeric chains. The mononuclear Co(II) and Co(III) pseudohalide complexes 3–6 reveal only terminal 3-ampy ligands. The 3-ampy ligands form supramolecular hydrogen bonded systems via their NH2-groups and non-covalent π-π ring-ring interactions via their pyridine moieties. Thermoanalytical properties were investigated for 1–3. Graphic abstract

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