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Synthesis and Antimicrobial Activities of Novel Palladium (II) Complexes of Active Schiff’s Base Ligand Derived from 5-Bromo Isatin

Patange A. N., Yadav U. M., Desai P. A., Singare P. U.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 52

22--27

EN

This paper presents the synthesis and antimicrobial studies of Palladium (II) complexes of ThioSemicarbazone Pd (L1H)2Cl2 and Semicarbazone Pd (L2H)2Cl2 derived from 5-Bromo Isatin. All complexes reported here had been characterised by1H NMR and IR spectral studies .the complexes are diamagnetic in nature and showing square planner geometry. The IR spectral data reveals that both the Schiff’s bases behave as bidentate ligands and are co-ordinated to Pd (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, Salmonella abony.

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Synthesis, spectral correlations and biological activities of some (E)-[4-(substituted benzylidene amino)phenyl] (phenyl) methanones

Mayavel P., Thirumurthy K., Dineshkumar S., Thirunarayanan G.

International Letters of Chemistry, Physics and Astronomy

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2014

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Vol. 20, iss. 2

145--159

EN

A series of Schiff’s bases have been synthesized by fly-ash:p-toluenesulfonic acid (fly-ash:PTS) catalyzed microwave assisted oxidative coupling of arylamines and substituted benzaldehydes under solvent-free condition. The synthesized Schiff’s bases are characterized by their physical constants, analytical and spectroscopic data. The group frequencies of imines such as IR (v, cm–1) and NMR (δ, ppm) spectral data was correlated with Hammett substituent constants, F and R parameters using single and multi-linear regression analysis. The antimicrobial activities of these Schiff’s bases have been studied using Bauer-Kirby method.

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Synthesis and Characterization of Cu(II), Ni(II), Co(II),Mn(II), Zn(II), Ru(III), Hf(IV) and ZrO(II) Complexes of 2-Thiophenylidene-N-4-methoxy Anilinoacetohydrazone

El-Saied F. A, Abou El-Enein S. A., Emam S. M., El-Shater H. A.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 11

1871-1883

EN

A new hydrazone ligand (HL), [2-(4-methoxyphenylamino)-N'-(thio phen-2-yl-methy - lene)acetohydrazide], was prepared and characterized. The ligand reacted with Cu(II), Ni(II), Co(II), Mn(II), Zn(II), Hf(IV), Ru(III) and ZrO(II) ions to yield mononuclear complexes. The obtained metal complexes have been characterized using elemental and thermal analyses (TG and DTA), IR, UV-Vis and ESR as well as magnetic moment and molar conductance measurements. The results showed that the hydrazone behaves as a neutral bidentate ligand which coordinates with the metal ions via the thiophene sulphur atom and imido N-H as in case of complexes of the general formula: [M(HL)2X2]×nH2O, where M = Cu(II), X = OAc, n = 2; M = Co(II), X = Cl and Br, n = 0, 1, re spec tively; M = Ni(II), X = OAc, n = 1; M = Mn(II), X = OAc, n = 1; M = Zn(II), X = OAc, n = 0; M = ZrO(II), X = Cl, n = 5; [M(HL)2(NO3)]×NO3×nH2O, where M = Co(II), n = 1; M = Zn(II), n = 0; [M(HL)X2]×nH2O, where M = Cu(II), X = Cl, n = 1; M = Co(II), X = OAc, n = 1 and [Ru(HL)2Cl2]Cl. The ligand also coordinates via the carbonyl oxygen atom and azomethine ni tro gen atom as in case of [Cu(HL)(NO3)]NO3×1.5H2O complex and via the carbonyl oxygen atom and the aniline N-H as in case of complexes [Ni(HL)Cl2]×H2O and [Ni(HL)2(NO3)]×NO3×4H2O. As a tridentate monobasic ligand HL co or di nates through the thiophene sul phur atom, azomethine ni tro gen atom and the enolic ox y gen atom as in case of complex [Hf(L)Cl3]×3H2O. The geometrical shapes of complexes also have been elucidated. The thermal behavior of some metal complexes has also been studied using TG and DTA.

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Badanie właściwości tryboelektrycznych układów poli(tereftalan etylenu)/salicylidenoaniliny podstawione w położeniu para

Szczerba J., Prot T.

Polimery

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1998

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T. 43, nr 7-8

472-479

PL

W celu uzyskania efektywnego transportera ładunków (CTA - charge transfer agent) otrzymaliśmy kilka salicylidenoanilin [równanie (l)], które zostały w pełni zidentyfikowane na podstawie danych literaturowych i w badaniach spektrofotometrycznych (NMR, IR, UV-vis). Za pomocą programu komputerowego HyperChem porównaliśmy otrzymane doświadczalnie widma z widmami wynikającymi z modelowania molekularnego (obliczenia metodami mechaniki kwantowej). Uzyskaliśmy korelację o współczynniku 0,99. Za pomocą własnej oryginalnej aparatury zbadaliśmy ładunki tryboelektryczne (znak i wartość ładunku) poszczególnych salicylidenoanilin oraz ich wpływ na ładunek wybranego dielektryka polimerycznego - żywicy poliestrowej typu poli(tereftalanu etylenu) (PET). Określiliśmy korelację pomiędzy oznaczonym ładunkiem tryboelektrycznym a strukturą chemiczną otrzymanych związków; zbadaliśmy przy tym wpływ podstawników na właściwości tryboelektryczne salicylideno-anilin. Na podstawie obliczeń komputerowych udowodniliśmy, że istnieje korelacja pomiędzy właściwościami związku wynikającymi z obliczeń kwantowo-mechanicznych (energią oddziaływań elektrostatycznych - CCR, oddziaływaniem Van der Waalsa - VDW, momentem dipolowym - MD oraz energią elektronową - EE) a wynikami tryboelektryzacji. Do-danie do PET 5% mas. Jednej z otrzymanych przez nas salicylidenoanilin w istotny sposób zwiększa ładunek tryboele-ktryczny PET; najskuteczniejsza jest pod tym względem p-nitrosalicylidęnoanilina.

EN

The literature data made us synthesize a series of salicylide-neanilines; they were identified by NMR, IR and UV-VIS spectra. A Hyper-Chem routine was used to compare the spectra recorded with those resulting from quantum-mechanical modelling; the correlation coefficient obtained was 0.99. The triboelectric charge and its value were examined and the effect of the compounds prepared on the electric charge of selected dielectric polymer-polyester resin (PET type) was studied. A relationship was established between the triboelectric charge and the chemical structure of the compounds examined; the substituent effect in salicylideneanilines on the triboelectric properties was studied. Computer calculations showed the properties evaluated for the compounds by quantum-mechanical calculations (energy of electrostatic interactions (CCR), van der Waals interactions (vdW), dipole moment (MD) and electronic energy (EE)) to correlate well with the tribo-electric data. A salicylideneaniline, 5%, added to PET increased substantially the triboelectric charge of the PET; p-nitrososalicylideneaniline was the most efficient compound in that respect.