Metal Ion Directed Synthesis of 20‐Membered Octaaza Macrocyclic Complexes of Co(II), Ni(II), Cu(II), and Zn(II) and Their Physico‐chemical Properties

2004 ◽  
Vol 34 (5) ◽  
pp. 847-858
Author(s):  
Mohammad Shakir ◽  
Poonam Chingsubam ◽  
Yasser Azim ◽  
Shama Parveen
Keyword(s):  
Metal Ion ◽  
Chemical Properties ◽  
Macrocyclic Complexes ◽  
Physico Chemical ◽  
Directed Synthesis

Polynomials of Degree-Based Indices of Metal-Organic Networks

2020 ◽  
Vol 23 ◽  
Author(s):  
Ali Ahmad ◽  
Muhammad Ahsan Asim ◽  
Muhammad Faisal Nadeem
Keyword(s):  
Metal Ion ◽  
Chemical Properties ◽  
Molecular Structures ◽  
Topological Descriptors ◽  
Molecular Compound ◽  
Super Capacitor ◽  
Physico Chemical ◽  
Metal Organic ◽  
Carbon Based ◽  
Organic Networks

Aim and Objective: Metal-organic network (MON) is a special class of molecular compounds comprising of groups or metal ion and carbon-based ligand. These chemical compounds are examined employing one, two- or threedimensional formation of porous ore and subfamilies of polymers. Metal-organic networks are frequently utilized in catalysis for the parting & distillation of different gases and by means of conducting solid or super-capacitor. In various scenarios, the compounds are observed balanced in the procedure of deletion or diluter of the molecule and can be rebuilt with another molecular compound. The physical solidity and mechanical characteristics of the metal-organic network have attained great attention due to the mention properties. This study was undertaken to find the polynomials of MON. Methods: Topological descriptor is a numerical number that is utilized to predict the natural correlation amongst the physico-chemical properties of the molecular structures in their elementary networks. Results: After partitioning the vertices based on their degrees, we calculate different degree-based topological polynomials for two distinct metal-organic networks with an escalating number of layers containing both metals and carbon-based ligand vertices. Conclusion: In the analysis of the metal-organic network, topological descriptors and their polynomials play an important part in modern chemistry. An analysis between the calculated various forms of the polynomials and topological descriptors through the numeric values and their graphs is also comprised.

scholarly journals Complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with ligand formed by condensation reaction of isatin with glutamic acid

2020 ◽  
Vol 45 (3) ◽  
pp. 12-27
Author(s):  
Wiesława Ferenc ◽  
Dariusz Osypiuk ◽  
Jan Sarzyński ◽  
Halina Głuchowska
Keyword(s):  
Glutamic Acid ◽  
Metal Ion ◽  
Magnetic Measurements ◽  
Condensation Reaction ◽  
Chemical Properties ◽  
Ligand Field ◽  
Decomposition Products ◽  
Carboxylate Groups ◽  
Physico Chemical ◽  
Crystalline Forms

The complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with ligand (H2L=C13H12N2O5) formed by condensation reaction of isatin and glutamic acid were synthesized. Their physico-chemical properties were characterized using elemental analysis, XRF, XRD, FTIR, TG–DSC and TG–FTIR methods and magnetic measurements (Gouy’s and SQUID-VSM methods). The complexes were obtained in crystalline forms (monoclinic or triclinic) with the formulae: M(LH)2·nH2O for Mn(II), Ni(II) and Zn(II) and ML·nH2O for Co(II) and Cu(II), where LH=C13H11N2O5–, L-=C13H10N2O52–, n = 1 for Mn(II), Cu(II) and Zn(II), n = 2 for Co(II) and n = 3 for Ni(II). In air at 293–1173 K they decompose in three steps forming finally the oxides of the appropriate metals. The gaseous decomposition products were identified as: H2O, CO2, CO, hydrocarbons and N2O. The magnetic moment values for complexes (except Zn(II) complex) show their paramagnetic properties with the ferro- and antiferromagnetic interactions between central ions. The compounds of Mn(II) and Co(II) are high spin complexes with weak ligand field. In Co(II) and Cu(II) complexes two carboxylate groups take part in the metal ion coordination while in those of Mn(II), Ni(II) and Zn(II) only one carboxylate anion coordinates to central ion.

scholarly journals Structural characterization of calcium glycinate, magnesium glycinate and zinc glycinate

2017 ◽  
Vol 10 (03) ◽  
pp. 1650052 ◽  
Author(s):  
Li-Hui Yin ◽  
Xu-Ping Liu ◽  
Lu-Yao Yi ◽  
Jin Wang ◽  
Ya-Jun Zhang ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Metal Ion ◽  
Chemical Properties ◽  
Structure Characterization ◽  
Metal Compounds ◽  
Nutrient Supplements ◽  
Physico Chemical ◽  
Metal Contents ◽  
New Type

Metal glycinate chelates are formed by glycine and metal compounds through chemical reactions. Calcium glycinate, magnesium glycinate and zinc glycinate are kinds of new-type and ideal nutrient supplements, which have satisfactory physico-chemical properties and bioactivities. They are important for prophylaxis and treat metal deficiency. The structural characterization shows that the metal ion is bonded to the amino and carboxyl group to form two five-membered rings. This paper mainly studies the structure characterization of the metal chelated glycinates by their solubility, infrared spectrum, thermal analysis, mass spectrometry, polycrystal diffraction, the metal contents and glycine contents of calcium glycinate, magnesium glycinate and zinc glycinate.

scholarly journals 1-Vinylazulenes with Oxazolonic Ring-Potential Ligands for Metal Ion Detectors; Synthesis and Products Properties

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1209
Author(s):  
Mihaela Cristea ◽  
Liviu Bîrzan ◽  
Florea Dumitrascu ◽  
Cristian Enache ◽  
Victorita Tecuceanu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Physical Properties ◽  
Metal Ion ◽  
Nmr Spectra ◽  
Electron Distribution ◽  
Chemical Properties ◽  
Reaction Conditions ◽  
Physico Chemical ◽  
Heavy Metals Ions ◽  
New Compounds

As a continuation of research on 1-vinylazulenes synthesis, on their physico–chemical properties as well as on their use as colorimetric and electrochemical materials for the detection of heavy metals ions, new compounds, 4-(azulen-1-ylmethylene)-2-phenyloxazol-5(4H)-ones, are reported. The exceptional structure of azulene moiety with symmetrical electron distribution only with respect to the x-axis gives some special chemical and physical properties to compounds in which it is inserted. Various azulene-1-carbaldehydes and hippuric acids are condensed with good yields in Erlenmeyer—Plöchl reaction conditions. The obtained 1-vinylzulenes were characterized and their UV-Vis and NMR spectra were briefly discussed.

scholarly journals Magnetic, spectrochemical and thermal properties of the 2-chloro-5-nitrobenzoates of Co(II), Ni(II) and Cu(II)

2006 ◽  
Vol 71 (8-9) ◽  
pp. 929-937 ◽  
Author(s):  
Wiesława Ferenc ◽  
Agnieszka Walków-Dziewulska ◽  
Beata Cristóvão ◽  
Jan Sarzyñski
Keyword(s):  
Thermal Decomposition ◽  
Thermal Properties ◽  
Metal Ion ◽  
Chemical Properties ◽  
Water Molecules ◽  
Dehydration Process ◽  
Crystallization Water ◽  
Physico Chemical ◽  
One Step ◽  
Hydrated Complexes

Some physico-chemical properties of the 2-chloro-5-nitrobenzoates of Co(II) Ni(II) and Cu(II) were studied. The complexes were obtained as hydrates with a metal ion to ligand ratio of 1:2. All the complexes were polycrystalline compounds. Their colors depended on the nature of the central ion: pink for the Co(II) complex, green for the Ni(II) and blue for the Cu(II) compounds. Their thermal decomposition was studied in the range of 293-523 K because it was found that the 2-chloro-5-nitrobenzoates decomposed explosively on heating in air above 523 K. The hydrated complexes lost crystallization water molecules in one step. From the results, it appeared that no transformation of the nitro group to nitrite occurred during the dehydration process. Their solubilities in water at 293 K were of the order of 10-2 mol dm-3 for the Ni(II) and Co(II) complexes and 10-4 mol dm-3 for that of Cu(II). The magnetic moment values of Co2+, Ni2+ and Cu2+ in the 2-chloro-5-nitrobenzoates, experimentally determined in the range, of 76-303 K ranged from 3.48 to 3.82 ?B for Co(II), from 2.69 to 3.08 ?B for the Ni(II) and from 1.87 to 2.00 ?B for the Cu(II) complex. The 2-chloro-5-nitrobenzoates of Co(II), Ni(II) and Cu(II) followed the Curie-Weiss law.

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