CHARACTERISATION OF Fe(III), Co(II), Ni(II) AND Cu(II) COMPLEXES OF SALICYLSALICYCLICACID HYDRAZONE BY PHYSICO-CHEMICAL METHODS

The complexes of Fe(III), Co(II), Ni(II) and Cu(II) with salicylsalicyclicacid hydrazone (SSAH) were synthesized. The ligand and the complexes were characterized by elemental analyses, UV-Vis, IR and 1H NMR spectra, as well as by thermal analysis, molar conductivity and magnetic moment measurements. The tentative geometry of the complexes was proposed in each case and it was proposed that the metal ions under study form 1:1 complex with the ligand.

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Metal complexes of sulfur–nitrogen chelating agents. V. 2-N-Ethylaminocyclopentene-1-dithiocarboxylic acid complexes of Ni(II), Pd(II), Pt(II), Co(II), Co(III), and Cu(I)

Canadian Journal of Chemistry ◽

10.1139/v76-400 ◽

1976 ◽

Vol 54 (17) ◽

pp. 2827-2831 ◽

Cited By ~ 34

Author(s):

K. Nag ◽

D. S. Joardar

Keyword(s):

Thermal Analysis ◽

Metal Ions ◽

Metal Complexes ◽

Magnetic Moment ◽

Nmr Spectra ◽

Chelating Agents ◽

Metal Chelates ◽

Ambidentate Ligand

2-N-Ethylaminocyclopentene-1-dithiocarboxylic acid (EACDA) acts as an ambidentate ligand toward several metal ions. Bis-chelates have been obtained with Ni(II), Pd(II), Pt(II), and Co(II), and tris-chelate with Co(III). Cu(I) forms a 1:1 complex. The bonding sites involved in the metal chelates and their stereochemistry have been ascertained from electronic, infrared and nmr spectra, magnetic moment, and thermal analysis. In the Co(II) and Co(III) chelates bonding takes place from (S,S−) donor sites, whereas in the Ni(II), Pd(II), and Pt(II) chelates (N,S−) type bonding occurs. The Cu(I) complex appears to be polymeric in nature.

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NMR Studies of the Interaction of Metal Ions with Poly-(1,4-hexuronates). V. Quantitative Separation of Contact and Dipolar Contributions to Lanthanide Induced Shifts in 1H NMR Spectra of Methyl alpha-D-Gulo- and Methyl beta-D-Hamamelo-pyranosides, 1,6-Anhydro-beta-D-manno-, 1,6-Anhydro-beta-D-talo- and 1,6-Anhydro-beta-D-allo-pyranoses and Epi-inositol.

Acta Chemica Scandinavica ◽

10.3891/acta.chem.scand.32a-0031 ◽

1978 ◽

Vol 32a ◽

pp. 31-39 ◽

Cited By ~ 7

Author(s):

Hans Grasdalen ◽

Thorleif Anthonsen ◽

Ole Harbitz ◽

Bjørn Larsen ◽

Olav Smidsrød ◽

...

Keyword(s):

Metal Ions ◽

1H Nmr ◽

Nmr Spectra ◽

1H Nmr Spectra ◽

Nmr Studies ◽

Lanthanide Induced Shifts ◽

Quantitative Separation

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Synthesis and Antimicrobial Evaluation of Some Novel Pyrimidine, Pyrazole, Chromene and Tetrahydrobenzo[b]thiophene Derivatives Bearing Pyrimidinthione Moiety

Current Organic Synthesis ◽

10.2174/1570179417666200628021125 ◽

2020 ◽

Vol 17 (7) ◽

pp. 548-557

Author(s):

Mohamed Ahmed Mahmoud Abdel Reheim ◽

Ibrahim Saad Abdel Hafiz ◽

Mohamed Ahmed Elian

Keyword(s):

1H Nmr ◽

Nmr Spectra ◽

Chemical Shifts ◽

Bacterial Biofilm ◽

1H Nmr Spectra ◽

Internal Reference ◽

Aluminum Sheets ◽

Elemental Analyses ◽

Antimicrobial Evaluation ◽

Thiophene Derivatives

Aim and Objective: A novel collection of fused pyrimidine, pyridine, pyrazole, chromene and thiophene derivatives 2-30 have been newly synthesized by using the 1a, b as starting material. Fused pyrane exhibits a range of pharmacological activity such as cancer agents [1], antimicrobial [2-4], antioxidant [5], antiproliferative [6], cytotoxic activity [7], anticipated antitumor [8], antiparkinsonian [9] and anti-inflammatory [10]. Moreover, pyrane derivatives are well known for bacterial biofilm disruptor [11], anticonvulsant [12] and inhibitors of mycobacterium bovis [13]. Materials and Methods: All melting points were measured using the Akofler Block instrument and are uncorrected. IR spectra (KBr) were recorded on a FTIR 5300 spectrometer (υ, cm-1). The 1H-NMR spectra were recorded on a Varian Gemini spectrometer. The 1H-NMR spectra were run at 300, 400 MHz and 13C-NMR spectra were run at 100 MHz in DMSO-d6, CDCl3 as solvents. The chemical shifts are expressed in parts per million (ppm) by using tetramethylsilane (TMS) as an internal reference, 1000 EX mass spectrometer at 70 eV. The purity of synthesized compounds was checked by thin-layer chromatography (TLC) (aluminum sheets) using nhexane, EtOAc (9:1, V/V, 7:3 V/V) eluent. Elemental analyses were carried out by the Microanalytical Research Center, Faculty of Science, and Microanalytical Unit, Faculty of Pharmacy, Cairo University, Egypt. Results and Discussion: A novel series of azoles and azines were designed and prepared via the reaction of 7-amino- 5-(4-chlorophenyl)-4-phenyl-2-thioxo-2,5-dihydro-1H-pyrano- [2,3-d]pyrimidine-6-carbonitrile 1a and 7-amino-4,5- diphenyl-2-thioxo-2,5-dihydro-1H-pyrano[2,3-d]-pyrimidine-6-carbonitrile 1b with some electrophilic and nucleophilic reagents. The structures of target compounds were confirmed by elemental analyses and spectral data. The novel synthesized compounds showed good antimicrobial activity against the previously mentioned microorganisms. Conclusion: In conclusion, compounds 1a, 1b underwent ready cyclization to give fused heterocyclic compounds through reaction with different reagents and under different conditions and subjected to antimicrobial screening.

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Dinuclear UO2(VI), Th(IV), ZrO(IV) and VO(IV) complexes based on some Schiff-base ligands: Synthesis and structural elucidation

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v2i1.908 ◽

2013 ◽

Vol 2 (1) ◽

pp. 50-56

Author(s):

Ranjan K. Mohapatra ◽

S. Ghosh ◽

P. Naik ◽

D. C. Dash

Keyword(s):

Thermal Analysis ◽

Schiff Base ◽

1H Nmr ◽

Elemental Analysis ◽

Magnetic Moment ◽

Molar Conductivity ◽

Template Method ◽

Nmr Studies ◽

Schiff Base Ligands ◽

Paramagnetic Complexes

A series of homo binuclear complexs of the type [M2(L/L’)(NO3)n(H2O)2], [where M=UO22+, Th4+, ZrO2+] and [(VO)2(L/L’)(SO4)(H2O)], L= 4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene or L’= 10:11-benzo-4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene, n=2 for UO22+, ZrO2+ n=6 for Th4+, have been synthesized in template method from ethylenediamine/orthophenylene diamine, benzil monohydrazone and salicyldehyde and characterized on the basis of elemental analysis, thermal analysis, molar conductivity, magnetic moment, electronic, infrared, 1H-NMR studies. The results indicate that the VO(IV) ion is penta co-ordinated yielding paramagnetic complexes; UO2(VI), ZrO(IV) ions are hexa co-ordinated where as Th(IV) ion is octa co-ordinated yielding diamagnetic complexes of above composition.

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Synthesis and characterization of new complexes of some divalent transitional metals with isonicotinamido-4-chlorobenzalaldimine

Journal of the Serbian Chemical Society ◽

10.2298/jsc101027097a ◽

2011 ◽

Vol 76 (8) ◽

pp. 1103-1115 ◽

Cited By ~ 5

Author(s):

Viorica Ababei ◽

Angela Kriza ◽

Cristian Andronescu ◽

Magdalena Musuc

Keyword(s):

Thermal Analysis ◽

Magnetic Moments ◽

Molar Conductivity ◽

Azomethine Nitrogen ◽

Scanning Calorimetry ◽

Transitional Metals ◽

Physico Chemical ◽

Elemental Analyses

New complexes of isonicotinamido-4-chlorobenzalaldimine (INHCBA) with Cu(II), Co(II) and Cd(II), having formula of the type [M(INHCBA)(ac)2]?xH2O (M = Cu2+, x = 1, M = Co2+, x = 2, M = Cd2+, x = 0, ac = CH3COO-), and with Cu(II), Mn(II) and Zn(II), having formula of the type [M(INHCBA)2(H2O)2]SO4?xH2O (M = Cu2+, Mn2+, x = 2 and Zn2+ x = 2.5) were synthesized and characterized by analytical and physico-chemical techniques, i.e., elemental analyses, IR, UV-VIS- NIR and EPR spectroscopy as well as thermal analysis and the determination of the molar conductivity and magnetic moments. The thermal behaviour of complexes was studied by thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). The ligand behaves as bidentate NO, being coordinated through the azomethine nitrogen and carbonylic oxygen. The heats of decomposition, ?H, associated with the exothermal effects, were also determined.

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Faculty Opinions recommendation of Factors affecting the robustness of metabolite fingerprinting using 1H NMR spectra.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1019607.224426 ◽

2004 ◽

Author(s):

Oliver Fiehn

Keyword(s):

1H Nmr ◽

Nmr Spectra ◽

1H Nmr Spectra ◽

Metabolite Fingerprinting ◽

Factors Affecting

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1H-NMR spectra of high-boiling adamantylaromatic compounds

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19780250 ◽

1978 ◽

Vol 43 (1) ◽

pp. 250-256

Author(s):

Jaroslava Podehradská ◽

Milan Hájek ◽

Slavoj Hála

Keyword(s):

1H Nmr ◽

Nmr Spectra ◽

1H Nmr Spectra

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13C and 1H NMR Spectra of Synthetic (25R)-5α-Spirostanes

Journal of Chemical Research ◽

10.1177/174751989902300130 ◽

1999 ◽

Vol 23 (1) ◽

pp. 48-49

Author(s):

Martín A. Iglesias Arteaga ◽

Carlos S. Pérez Martinez ◽

Roxana Pérez Gil ◽

Francisco Coll Manchado

Keyword(s):

1H Nmr ◽

Nmr Spectra ◽

Chemical Shifts ◽

1H Nmr Spectra ◽

H Nmr ◽

C 23 ◽

Main Effects ◽

Nmr Signals

The assignment of 13C and 1H NMR signals of synthetic (25 R)-5α-spirostanes is presented; the main effects on chemical shifts due to substitution at C-23 are briefly discussed.

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