rakesh tada (24 risultati)

Condizione: New. pp. 60.

Condizione: New.

Condizione: New.

Condizione: New.

Taschenbuch. Condizione: Neu. Transition metal complexes of thiosemicarbazone | Study of Cu(II), Ni(II)and Co(II) complexes of thiosemicarbezide attached with quinoline aldehydes | Rakesh Tada (u. a.) | Taschenbuch | 68 S. | Englisch | 2014 | LAP LAMBERT Academic Publishing | EAN 9783844322316 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

Paperback. Condizione: Brand New. 104 pages. 8.66x5.91x0.24 inches. In Stock.

Taschenbuch. Condizione: Neu. Study On Metalloporphyrins | Synthesis and characterization of new meso-substituted metalloporphyrins | Rakesh Tada (u. a.) | Taschenbuch | 60 S. | Englisch | 2014 | Scholars' Press | EAN 9783639716504 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

paperback. Condizione: New. NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Summarizes the preparation and structure characterization of various thiosemicarbazones attached Quinoline aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. In the elemental analysis of the synthesized compound both calculated and found percentages of elements are matched so elemental analysis confirms the structure of the thiosemicarbazone. Mass spectral data confirm the structure of the ligand as indicated by the molecular ion peak (M+) corresponding to their molecular weight. In IR spectra of the synthesized thiosemicarbazone showed useful information about the structure of the compound. In the IR spectra, some significant stretching bands due to -N-H, -N-N-, -NH2 and -C=S were observed at specific frequencies. In the 1H NMR spectra, the signal due to -CH=N-, -N-NH, NH2 and aromatic protons were observed in the expected regions. The 13C NMR spectrum provides direct information about the carbon skeleton of the synthesized compound. 68 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The work presented in the Book entitled 'Stability constants of metal complexes' can be summarized as below. The practical proton-ligand and metal-ligand stability constants were determined by Calvin-Bjerrum titration technique using nitric acid and constant ionic strength was maintained with sodium nitrate. It was pointed out by Irving and Rossotti, that it is neither necessary to convert pH meter reading 'B' to stoichiometric hydrogen ion concentration nor to know the stoichiometric concentration of the neutral salt added to maintain constant ionic strength. The method is valid both in water and water-dioxane medium. The nitrate ion has very slight complexing tendency and the competition between nitrate ion and the ligand under study is of minor importance. This may be studied by comparing the stabilities of complexes of series of metal ions with a given ligand. For a given ligand, irrespective of its nature, the order of stability constants of complexes of bivalent ions of the first transition series are usually in the natural orders (some times called the Irving-Williams order). Cu(II)Ni(II)Co(II) 60 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The work presented in the Book entitled Study on Metalloporphyrins can be summarized in analytical and physical data; spectral data are compatible with the suggested structures. The complexes are colored, stable in air and insoluble in H2O, ethanol and non-polar solvents such as benzene. However, they dissolve in polar solvents such as DMF and DMSO. IR spectra of the complexes were recorded to confirm their structures. The assignments of the characteristic vibrational frequencies of the complexes were made by comparison with the vibrational frequencies of the free ligand. The ligand behaved as neutral tetradentate ligand coordinating through the four imine nitrogens. In all Complexes the signals of the imine groups were merged together and shifted to lower wave number accompanied by a decrease in their intensities, indicating they are involved in complex formation. The UV Vis absorption spectrum of the complexes shows single d d transition band in the 554-545 nm range as expected for a square planar copper(II) environment with similar N4 donor tetradentate Schiff base. 1H NMR studies of porphyrin reveal the aromatic nature of the porphyrin macrocycle. 60 pp. Englisch.

Condizione: New. Print on Demand pp. 60 2:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on Creme w/Gloss Lam.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The work presented in the Book entitled 'An approach to Study of Thiosemicarbazone And their transition metal complexes' can be summarizes the preparation and structure characterization of various thiosemicarbazones attached pyrazol aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. The most important bands in the infrared spectra of the Copper(II), Nickel(II) and Cobalt(II) complex of thiosemicarbazone are along within their tentative assignment. The position of these bands was helpful to detect the bonding sites of all ligand molecules interacted with metal. In principle, the ligand can exhibit thione-thiol tautomerism since it contains a thioamide NH-C=S functional group. 104 pp. Englisch.

Condizione: New. PRINT ON DEMAND pp. 60.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Nakum KiranM.Sc Chemistry(NET-JRF,GATE,SET)Mesomorphic characteristics in a series is induced by inducing anisotropicforce of attraction of suitable magnitude by varying geometrical phase and moiety of molecules which are directl.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Tada RakeshDepartment of chemistryd.k.v.arts & science college-jamnagar(gujarat)Summarizes the preparation and structure characterization of various thiosemicarbazones attached Quinoline aldehyde as well as their metal complexes.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The work presented in the Book entitled 'Stability constants of metal complexes' can be summarized as below. The practical proton-ligand and metal-ligand stability constants were determined by Calvin-Bjerrum titration technique using nitric acid and constant ionic strength was maintained with sodium nitrate. It was pointed out by Irving and Rossotti, that it is neither necessary to convert pH meter reading 'B' to stoichiometric hydrogen ion concentration nor to know the stoichiometric concentration of the neutral salt added to maintain constant ionic strength. The method is valid both in water and water-dioxane medium. The nitrate ion has very slight complexing tendency and the competition between nitrate ion and the ligand under study is of minor importance. This may be studied by comparing the stabilities of complexes of series of metal ions with a given ligand. For a given ligand, irrespective of its nature, the order of stability constants of complexes of bivalent ions of the first transition series are usually in the natural orders (some times called the Irving-Williams order). Cu(II)>Ni(II)>Co(II)VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 60 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Summarizes the preparation and structure characterization of various thiosemicarbazones attached Quinoline aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. In the elemental analysis of the synthesized compound both calculated and found percentages of elements are matched so elemental analysis confirms the structure of the thiosemicarbazone. Mass spectral data confirm the structure of the ligand as indicated by the molecular ion peak (M+) corresponding to their molecular weight. In IR spectra of the synthesized thiosemicarbazone showed useful information about the structure of the compound. In the IR spectra, some significant stretching bands due to -N-H, -N-N-, -NH2 and -C=S were observed at specific frequencies. In the 1H NMR spectra, the signal due to -CH=N-, -N-NH, NH2 and aromatic protons were observed in the expected regions. The 13C NMR spectrum provides direct information about the carbon skeleton of the synthesized compound.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 68 pp. Englisch.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The work presented in the Book entitled 'Stability constants of metal complexes' can be summarized as below. The practical proton-ligand and metal-ligand stability constants were determined by Calvin-Bjerrum titration technique using nitric acid and constant ionic strength was maintained with sodium nitrate. It was pointed out by Irving and Rossotti, that it is neither necessary to convert pH meter reading 'B' to stoichiometric hydrogen ion concentration nor to know the stoichiometric concentration of the neutral salt added to maintain constant ionic strength. The method is valid both in water and water-dioxane medium. The nitrate ion has very slight complexing tendency and the competition between nitrate ion and the ligand under study is of minor importance. This may be studied by comparing the stabilities of complexes of series of metal ions with a given ligand. For a given ligand, irrespective of its nature, the order of stability constants of complexes of bivalent ions of the first transition series are usually in the natural orders (some times called the Irving-Williams order). Cu(II)Ni(II)Co(II).

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Summarizes the preparation and structure characterization of various thiosemicarbazones attached Quinoline aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. In the elemental analysis of the synthesized compound both calculated and found percentages of elements are matched so elemental analysis confirms the structure of the thiosemicarbazone. Mass spectral data confirm the structure of the ligand as indicated by the molecular ion peak (M+) corresponding to their molecular weight. In IR spectra of the synthesized thiosemicarbazone showed useful information about the structure of the compound. In the IR spectra, some significant stretching bands due to -N-H, -N-N-, -NH2 and -C=S were observed at specific frequencies. In the 1H NMR spectra, the signal due to -CH=N-, -N-NH, NH2 and aromatic protons were observed in the expected regions. The 13C NMR spectrum provides direct information about the carbon skeleton of the synthesized compound.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The work presented in the Book entitled 'Study on Metalloporphyrins' can be summarized in analytical and physical data; spectral data are compatible with the suggested structures. The complexes are colored, stable in air and insoluble in H2O, ethanol and non-polar solvents such as benzene. However, they dissolve in polar solvents such as DMF and DMSO. IR spectra of the complexes were recorded to confirm their structures. The assignments of the characteristic vibrational frequencies of the complexes were made by comparison with the vibrational frequencies of the free ligand. The ligand behaved as neutral tetradentate ligand coordinating through the four imine nitrogens. In all Complexes the signals of the imine groups were merged together and shifted to lower wave number accompanied by a decrease in their intensities, indicating they are involved in complex formation. The UV-Vis absorption spectrum of the complexes shows single d-d transition band in the 554-545 nm range as expected for a square planar copper(II) environment with similar N4 donor tetradentate Schiff base. 1H NMR studies of porphyrin reveal the aromatic nature of the porphyrin macrocycle.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 60 pp. Englisch.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The work presented in the Book entitled Study on Metalloporphyrins can be summarized in analytical and physical data; spectral data are compatible with the suggested structures. The complexes are colored, stable in air and insoluble in H2O, ethanol and non-polar solvents such as benzene. However, they dissolve in polar solvents such as DMF and DMSO. IR spectra of the complexes were recorded to confirm their structures. The assignments of the characteristic vibrational frequencies of the complexes were made by comparison with the vibrational frequencies of the free ligand. The ligand behaved as neutral tetradentate ligand coordinating through the four imine nitrogens. In all Complexes the signals of the imine groups were merged together and shifted to lower wave number accompanied by a decrease in their intensities, indicating they are involved in complex formation. The UV Vis absorption spectrum of the complexes shows single d d transition band in the 554-545 nm range as expected for a square planar copper(II) environment with similar N4 donor tetradentate Schiff base. 1H NMR studies of porphyrin reveal the aromatic nature of the porphyrin macrocycle.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The work presented in the Book entitled 'An approach to Study of Thiosemicarbazone And their transition metal complexes' can be summarizes the preparation and structure characterization of various thiosemicarbazones attached pyrazol aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. The most important bands in the infrared spectra of the Copper(II), Nickel(II) and Cobalt(II) complex of thiosemicarbazone are along within their tentative assignment. The position of these bands was helpful to detect the bonding sites of all ligand molecules interacted with metal. In principle, the ligand can exhibit thione-thiol tautomerism since it contains a thioamide NH-C=S functional group.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 104 pp. Englisch.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The work presented in the Book entitled 'An approach to Study of Thiosemicarbazone And their transition metal complexes' can be summarizes the preparation and structure characterization of various thiosemicarbazones attached pyrazol aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. The most important bands in the infrared spectra of the Copper(II), Nickel(II) and Cobalt(II) complex of thiosemicarbazone are along within their tentative assignment. The position of these bands was helpful to detect the bonding sites of all ligand molecules interacted with metal. In principle, the ligand can exhibit thione-thiol tautomerism since it contains a thioamide NH-C=S functional group.