scholarly journals Synthesis and Characterization of Newly Synthesized Thiosemicarbazone Ligands with IR, NMR and Mass Spectral Techniques

2019 ◽  
Vol 35 (Special Issue 1) ◽  
pp. 43-47
Author(s):  
N. Rama Jyothi ◽  
N. A. Mohamed Farook
Keyword(s):  
Synthesis And Characterization ◽  
Spectral Techniques ◽  
Mass Spectral

Synthesis and Characterization of Palladium(II) Complexes with Substituted Dihydrobenzoimidazo Quinazoline Derivatives

2017 ◽  
Vol 13 (2) ◽  
pp. 1-15
Author(s):  
Rita Bhattacharjee Virupaiah Gayathri
Keyword(s):  
Metal Ion ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Conductivity Measurements ◽  
Spectral Techniques ◽  
Mass Spectral ◽  
Square Planar ◽  
Elemental Analyses ◽  
Quinazoline Derivatives

A series of palladium(II) halo complexes of the types [PdX 2 L 2 ].nH 2 O {n = 0, X = Cl, L = L 2 , L 4 and L 5 ; X = Br, L = L 2 ; n = 1, X = Cl, L = L 1 and L 3 } and Pd 2 X 4 L 3 [X = Br, L = L 1 , L 3 , L 4   and L 5 ] were prepared where L is 6-R-5,6- dihydrobenzoimidazo quinazoline (R-Diq; where R = ethyl: L 1 / n or i-propyl: L 2 , L 3 / n or i-butyl: L 4 , L 5 ) and characterized by elemental analyses, conductivity measurements, TGA, infrared, electronic, NMR and mass spectral techniques. Based    on these studies monomeric/dimeric structure with a square planar geometry around the metal ion was proposed for all the complexes. Some of the complexes were investigated for anti-microbial activity.

scholarly journals Mass Spectrometry-Based Characterization of New Spirolides from Alexandrium ostenfeldii (Dinophyceae)

Marine Drugs ◽  
2020 ◽  
Vol 18 (10) ◽  
pp. 505
Author(s):  
Joyce A. Nieva ◽  
Jan Tebben ◽  
Urban Tillmann ◽  
Sylke Wohlrab ◽  
Bernd Krock
Keyword(s):  
Mass Spectrometry ◽  
High Resolution Mass Spectrometry ◽  
Molecular Ions ◽  
Ring System ◽  
The Other ◽  
Spectral Techniques ◽  
Mass Spectral ◽  
Alexandrium Ostenfeldii ◽  
Different Strains

Spirolides belong to a group of marine phycotoxins produced by the marine planktonic dinophyte Alexandrium ostenfeldii. Composed of an imine moiety and a spiroketal ring system within a macrocylcle, spirolides are highly diverse with toxin types that vary among different strains. This study aims to characterize the spirolides from clonal A. ostenfeldii strains collected from The Netherlands, Greenland and Norway by mass spectral techniques. The structural characterization of unknown spirolides as inferred from high-resolution mass spectrometry (HR-MS) and collision induced dissociation (CID) spectra revealed the presence of nine novel spirolides that have the pseudo-molecular ions m/z 670 (1), m/z 666 (2), m/z 696 (3), m/z 678 (4), m/z 694 (5), m/z 708 (6), m/z 720 (7), m/z 722 (8) and m/z 738 (9). Of the nine new spirolides proposed in this study, compound 1 was suggested to have a truncated side chain in lieu of the commonly observed butenolide ring in spirolides. Moreover, there is indication that compound 5 might belong to new spirolide subclasses with a trispiroketal ring configuration having a 6:5:6 trispiroketal ring system. On the other hand, the other compounds were proposed as C- and G-type SPX, respectively. Compound 7 is proposed as the first G-type SPX with a 10-hydroxylation as usually observed in C-type SPX. This mass spectrometry-based study thus demonstrates that structural variability of spirolides is larger than previously known and does not only include the presence or absence of certain functional groups but also involves the triketal ring system.

scholarly journals Efficient Synthesis and Characterization of Some Novel Nitro-Schiff Bases and Their Complexes of Nickel(II) and Copper(II)

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Hossein Naeimi ◽  
Mohsen Moradian
Keyword(s):  
Schiff Base ◽  
Schiff Base Complexes ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Hydroxyl Groups ◽  
Spectroscopic Techniques ◽  
Spectral Techniques ◽  
Chemical Structures ◽  
Ft Ir

Synthesis and characterization of some new Schiff base ligands derived from various diamines and nitrosalicylaldehyde and their complexes of Ni(II) and Cu(II) are reported. Several spectral techniques such as UV-Vis, FT-IR, and NMR spectra were used to identify the chemical structures of the reported ligands and their complexes. The ligands are found to be bound to the metal atom through the oxygen atoms of the hydroxyl groups and nitrogen atoms of imine groups, which is also supported by spectroscopic techniques. The results obtained by FT-IR and NMR showed that the Schiff base complexes of transition metal (II) have square-planar geometry.

Synthesis and characterization of N-glucosylated dithiadiazepine derivatives through carbon-sulfur bond formation

2015 ◽  
Vol 21 (5) ◽  
pp. 269-272 ◽  
Author(s):  
Snehal A. Chavan ◽  
Avinash G. Ulhe ◽  
Baliram N. Berad
Keyword(s):  
Bond Formation ◽  
Synthesis And Characterization ◽  
Mass Spectral ◽  
H Nmr ◽  
Chemical Structures ◽  
Elemental Analyses ◽  
New Compounds ◽  
Sulfur Bond ◽  
C Nmr

AbstractNew 4,7-bis(arylamino)-2-tetra-O-acetyl-β-d-glucopyranosylimino-1,3,5,6-dithiadiazepines were synthesized via reaction of N-tetra-O-acetyl-β-d-glucopyranosyl isocyanodichloride with 1,6-diaryl-2,5-dithio-bis-ureas without using any catalyst. Thus, the synthesis of 7-membered heterocycles containing two sulfur and two nitrogen atoms through carbon-sulfur bond formation was explored. The chemical structures of these new compounds were elucidated by IR, 1H NMR, 13C NMR, mass spectral, and elemental analyses.

scholarly journals Microwave Assisted Synthesis and Characterization of Schiff Base of 2-Amino Benzimidazole

2018 ◽  
Vol 10 (4) ◽  
Author(s):  
Garima Shrivastava ◽  
Manjul Shrivastava
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Aromatic Aldehyde ◽  
Synthesis And Characterization ◽  
Microwave Assisted Synthesis ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Microwave Assisted

New Schiff base (2-[(1H-benzimidazol-2-ylimino) methyl]-4,6- diiodophenol) was synthesized by the condensation of aryl/hetero aromatic aldehyde (3,5diiodosalicylaldehyde) with 2- amino benzimidazole under conventional and microwave conditions and characterized through IR, HNMR and Mass spectral data and CHN analysis

Synthesis and characterization of some S,S-Dimethyl-N-pyrimidinylsulfimides

1983 ◽  
Vol 36 (10) ◽  
pp. 2119 ◽  
Author(s):  
DT Hurst
Keyword(s):  
Synthesis And Characterization ◽  
Mass Spectral ◽  
Convenient Synthesis ◽  
Elemental Analyses

A convenient synthesis of several S,S-dimethyl-N-pyrimidin-2 4-ylsulfimides is described. The compounds were characterized by n.m.r., mass spectral and elemental analyses.

Phenolic Analogs of Amino Carboxylic-Acid Ligands for Tc-99m. 1. Synthesis and Characterization of N,N'-Ethylenebis[2-(-O-Hydroxyphenyl)Glycines] (Ehpg)

1987 ◽  
Vol 40 (10) ◽  
pp. 1695 ◽  
Author(s):  
JG Wilson
Keyword(s):  
Carboxylic Acid ◽  
Spectral Data ◽  
Dimethyl Ester ◽  
Synthesis And Characterization ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Amino Carboxylic Acid

Nine N,N'- ethylenebis [2-(o- hydroxyphenyl ) glycines ] ( ehpg ) have been prepared and characterized by conversion into their dimethyl ester dihydrochlorides. Their i.r ., 1H n.m.r. and f.a.b. mass spectral data are presented and discussed.

Synthesis and Characterization of Some Dibasic Tridentate Schiff Base Ligands

1975 ◽  
Vol 53 (6) ◽  
pp. 939-944 ◽  
Author(s):  
Elmer C. Alyea ◽  
Abdul Malek
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Schiff Base ◽  
Magnetic Resonance ◽  
Synthesis And Characterization ◽  
Mass Spectral Data ◽  
Schiff Base Ligands ◽  
Mass Spectral ◽  
Structural Formulas ◽  
Tridentate Schiff Base

The synthesis and characterisation of several dibasic tridentate Schiff base ligands (H2SB) are described. Structural formulas for the isolated ligands are suggested on the basis of infrared, nuclear magnetic resonance, and mass spectral data.

scholarly journals Synthesis and Characterization of Some Novel Coumarin Based 2-Pyridone Heterocycles with their Broad Spectrum Antimicrobial Potency

2016 ◽  
Vol 66 ◽  
pp. 1-12 ◽  
Author(s):  
Nisheeth C. Desai ◽  
Tushar J. Karkar
Keyword(s):  
Antimicrobial Activity ◽  
Synthesis And Characterization ◽  
Bacterial Strains ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr ◽  
Bacteria And Fungi ◽  
Broth Dilution ◽  
C Nmr

The synthesis of a novel series of 6-((arylidene) amino)-2-oxo-1-((1-(2-oxo-2H-chromen-3-yl) ethylidene) amino)-4-phenyl-1,2-dihydropyridine-3,5-dicarbonitriles 4a-o were synthesized and structures of compounds have been elucidated by IR,1H NMR,13C NMR and mass spectral data. Antimicrobial activity was measured against certain strains of bacteria and fungi by serial broth dilution. Evaluation of antimicrobial activity shown that the compounds (4g, 4j, 4k and 4o) were found to be most active against selected bacterial strains and compounds (4d, 4m and 4n) were found to be most active against selected fungal strains.

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