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Wyszukujesz frazę "schiff base" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Synthesis and characterization of 2-(methylthio)-6-oxo-6H-chromeno[3,4-e]pyrazolo[1,5-a]pyrimidine-3-carbonitrile derivatives
    Autorzy:
    Ajudiya, Yogesh M.
    Babariya, Jayesh S.
    Upadhyay, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070890.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Pyrazolo pyrimidine
    Schiff base
    coumarine
    Opis:
    Some new 2-(methylthio)-6-oxo-6H-chromeno[3,4-e]pyrazolo[1,5-a]pyrimidine-3-carbonitrile derivatives Having coumarine nucleus were synthesized by novel synthetic rout from 4-chloro 3-carbaldehyde coumarine derivatives and previously prepared 5-amino-3-(methylthio)-1H-pyrazole-4-carbonitrile using methanol as a solvent and catalytic amount of glacial acetic acid. All the synthesised libraries were characterized by IR, NMR and mass spectral analysis.
    Źródło:
    World Scientific News; 2019, 123; 258-264
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and antimicrobial evolution of some new benzotriazole substituted 1,3,4-thiadiazoles
    Autorzy:
    Godhani, Dinesh R.
    Mulani, Vishal B.
    Mehta, Jignasu P.
    Kukadiya, Nipul B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177753.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antimicrobial activity
    benzotriazole
    cytotoxicity
    haemolysis
    schiff base
    thiadiazole
    Opis:
    A series of novel benzotriazole-substituted 1,3,4-thiadiazole-2(3H)-thione derivatives was synthesized by cyclization of Schiff base. The structures were recognized on the foundation of spectral tools and their purity by elemental analysis. All the compounds were preliminary evaluated for their in vitro antimicrobial activities against five bacterial strains viz [Staphylococcus aureus (MRSA; ATCC 43300), Klebsiella pneumoniae (ATCC 700603), Escherichia coli (ATCC 25922), Acinetobacter baumannii (ATCC 19606), Pseudomonas aeruginosa (ATCC 27853)] and two fungi Strains viz. [Candida albicans (ATCC 90028), Cryptococcus neoformans (ATCC 208821)]. Several compounds exhibited remarkable antimicrobial activity, out of 15 compounds, three compounds viz. 5a, 5g and 5i showed promising antifungal activities with no signs of human cells cytotoxic [HEK293: Human Embryonic Kidney cells (ATCC CRL-1573)] and haemolytic activity [Whole blood (ARCBS 5400 00150)].
    Źródło:
    World Scientific News; 2018, 100; 51-60
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, spectral characterization (FT-IR and NMR) and DFT (Molecular structure, HOMO-LUMO, NLO) computational studies on some novel (E)-N-phenyl-3,5-dichloropyridin-4-amine and its derivatives
    Autorzy:
    Prabhakaran, N. R.
    Palanivel, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192697.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Schiff base
    DFT
    HOMO-LUMO
    Mulliken Charge
    MEP
    Opis:
    A new series of Schiff bases were synthesized for the first time by the condensation of substituted aldehyde and 3,5-dichloropyridin-4-amine in ethanol (1:1). The structure of Schiff bases were experimentally characterized by using IR and 1H NMR spectroscopic methods. The structural and vibrational properties of the studied molecules were investigated theoretically by performing density functional theory (DFT) to access reliable results to the experimental values and the calculation results showed good agreement with the experimental ones. The calculated HOMO and LUMO energies showed that charge transfer occurs within the molecule. Atomic charges and molecular electrostatic potential (MEP) have been calculated at the B3LYP method and standard 6-31G(d,p) basis set starting from optimized geometry.
    Źródło:
    World Scientific News; 2016, 46; 244-259
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computational characterization of (E)-N-(3-bromo-4-fluorobenzylidene)-4-nitrobenzenamine compound
    Autorzy:
    Premalatha, R.
    Santhi, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1179594.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    DFT
    HOMO-LUMO and NBO
    IR and Raman spectra
    Schiff base
    Opis:
    Schiff bases are aldehyde- or ketone-like compounds in which the carbonyl group is replaced by an imine or azomethine group. In this work, (E)-N-(3-bromo-4-fluorobenzylidene)-4-nitrobenzenamine have been synthesized and characterized by IR, 1H and 13C NMR spectral studies. Density functional theory (DFT) has been used to optimize geometrical parameters, atomic charges, vibrational wavenumbers and intensity of vibrational bands. The molecular properties HOMO-LUMO, NBO were calculated using B3LYP/6-311G (d, p) basis set. The polarizability and first order hyperpolariza-bility of the title Compound was calculated and interpreted.
    Źródło:
    World Scientific News; 2017, 74; 121-140
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Suzuki-Miyaura cross-coupling reaction catalyzed by new synthesized palladium complex containing N,N,O-Tridentate ligands
    Autorzy:
    Jadeja, Juvansinh J.
    Gondaliya, Mitesh B.
    Mokariya, Devang M.
    Shah, Manish
    Powiązania:
    https://bibliotekanauki.pl/articles/1182763.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    N
    O-Tridentate ligand
    Palladium complex
    Schiff base
    Suzuki-Miyaura cross-coupling reaction
    Opis:
    N,N,O-Tridentate ligands were prepared by the condensation of 1-(Benzothiazole 2-yl) hydrazine with substituted salicyldehydes or different aromatic ketones. New synthesized metal complex are thermally stable and neither air- nor moisture-sensitive. Suzuki–Miyaura cross-coupling reaction is carried out in present of various ligands and palladium salts, Different solvent/water ratio with different Base and studied effects its effect on the performance of the coupling reaction.
    Źródło:
    World Scientific News; 2017, 66; 238-249
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization, biological activity of Schiff bases derived from 2-bromo-4-methyl aniline and its potentiometric studies with Cu(II), Co(II) and Ni(II) ions
    Autorzy:
    Upadhyay, Surbhi V.
    Zala, Raksha V.
    Bhatt, Keyur D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030767.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-bromo-4-methyl aniline
    Antimicrobial activity
    Irving-Rossotti
    Potentiometric studies
    Schiff base
    Stability constant
    Opis:
    Schiff bases namely, 2-bromo-4-methyl-N-(2-nitrobenzylidene)aniline; 2-bromo-4-methyl-N-(2,4,5-trimethoxybenzylidene)aniline; 2-bromo-N-(4-methoxybenzylidene)-4-methylaniline and N-((1H-indol-3-yl)methylene-2-bromo-4-methylaniline have been synthesized and characterized by elemental analysis, FT-IR, Mass and 1H-NMR spectroscopy. Schiff bases have been screened for Antimicrobial activity against bacteria and fungi by using MIC determination. Binary complexes of Co(II), Ni(II) and Cu(II) with Schiff bases in solution have been studied potentiometrically in 60:40 % (V/V) 1,4-dioxane-water system at constant temperature 27 ±0.5 ºC and at an ionic strength of 0.1 M KNO3. The order of stability constant of formed binary complexes in solution was examined.
    Źródło:
    World Scientific News; 2020, 145; 1-15
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral studies and antimicrobial activities of some (E)-N-(substituted benzylidene)-2,6-diisopropylanilines
    Autorzy:
    Thirunarayanan, G.
    Manikandan, V.
    Aarulkumaran, R.
    Rarajan, R.
    Usha, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182740.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2
    6-di(propan-2-yl)aniline
    Schiff base
    Spectral correlation and Antimicrobial studies
    Synthesis
    Opis:
    A series of Schiff’s base compounds were synthesized from 2,6-di(propan-2-yl) aniline with substituted aromatic aldehydes. The structures of all the synthesized compounds were characterized by physical constants, IR and NMR spectroscopic techniques. All the observed IR frequencies νC=N (cm-1), NMR δ(ppm) of C-H & C=N chemical shifts have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analyses in order to study the effect of substituents on these spectral data has been studied. All the synthesized Schiff’s base compounds were screened for their antimicrobial activity by disc diffusion method.
    Źródło:
    World Scientific News; 2017, 66; 20-42
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and bioactivity study of 2-((E)-(((E)-2,6-dichlorobenzylidene)hydrazono)methyl) phenol have N,O-Bidentate ligand site and it’s metal complex
    Autorzy:
    Manawar, Rohit B.
    Gondaliya, Mitesh B.
    Mamtora, Mayank J.
    Shah, Manish
    Powiązania:
    https://bibliotekanauki.pl/articles/1075460.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antifungal activity
    Antimicrobial activity
    Bioactivity
    Elemental
    IR
    Mass
    Metal complex
    N
    NMR
    O-Bi-dentate ligand
    Schiff base
    Opis:
    N,O-Bi-dentate ligands were prepared by the condensation of (E)-(2,6-dichlorobenzylidene) hydrazine with substituted Salicylaldehyde and different aromatic aldehydes. New synthesized metal complex are thermally stable and neither air- nor moisture sensitive at RT. Successive ligand and their metal complex are synthesized and characterized using IR, NMR, Elemental, Mass, Physical property. With Bioactivity study of ligand and there metal complexes.
    Źródło:
    World Scientific News; 2019, 126; 222-247
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of some Novel Halogenated Platinum (II) Complexes of Active Schiff’s Base Ligand Derived from 5-Bromo Isatin and Evaluation of their Antibacterial Activity
    Autorzy:
    Patange, Ashok N.
    Yadav, Uttam M.
    Desai, Pratik A.
    Singare, Pravin U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194025.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    5-bromo Isatin
    Bacillus pumilus
    E. Coli
    Micrococcus Lutes
    Salmonella abony
    Schiff’s base
    Semicarbazone
    Thiosemicarbazone
    Opis:
    This paper presents the synthesis and antibacterial studies some novel halogenated Platinum (II) complexes of active Schiff’s base ligands of the type [Pt(L1H)2]Cl2, [Pt(L2H)2]Cl2 and[Pt(L)2] derived from 5-Bromo Isatin. Where L1H= hydrazinecarbothiamide of 5-bromoindolinedione and L2H = hydrazinecarboxamide of 5-bromoindolinedione. All complexes reported here had been characterised by 1H NMR and IR spectral studies. Molar conductance studies support the 1:2 natures of these complexes. Pt (II) complexes are diamagnetic in nature and showing square planner geometry. The IR spectral data reveals that both the Schiff’s bases (L1H and L2H) behave as bidentate ligands and are co-ordinated to Pt (II) metal through the sulfur and hydrogenic nitrogen atom.all the new synthesized compounds were screened for antibacterial activity against four of the test organisms like Bacillus pumilus, Micrococcus Lutes, E. coli and Salmonella abony
    Źródło:
    World Scientific News; 2015, 10; 32-43
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, spectral characterization and biological activity studies of Schiff’s base of 1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-4-amine and its metal complexes
    Autorzy:
    Jadeja, Juvansinh J.
    Gondaliya, Mitesh B.
    Mokariya, Devang M.
    Shah, Manish
    Powiązania:
    https://bibliotekanauki.pl/articles/1192661.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Schiff Bases
    anti-microbial activity
    Metal complexes
    spectral analysis
    Opis:
    N,O,O-donating tridentate ligand was prepared by condensed reaction 1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-4-amine with derivative of salicylaldehyde and its metal complexes with Zn, Cd and Hg, which is highly stable at room temperature and characterized by Mass spectra, IR, 1H and 13C NMR, ESI-MASS and TGA-DTA. Comparatively studies of anti-microbial and anti-fungal activity of different ligand and its metal complex carried out.
    Źródło:
    World Scientific News; 2016, 47, 2; 123-150
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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