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 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

The hex-5-enose degradation: cleavage of glycosiduronic acid linkages in modified methylated Sterculia gums

1987 ◽  
Vol 65 (9) ◽  
pp. 2069-2076 ◽  
Author(s):  
Gerald Oliver Aspinall ◽  
Lev Khondo ◽  
Bruce Alan Williams
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Galacturonic Acid ◽  
Uronic Acid ◽  
Zinc Dust ◽  
Degradation Products ◽  
Compositional Analysis ◽  
Mass Spectral Data ◽  
Mass Spectral

Reduction of uronic acid residues in permethylated polysaccharides from Sterculiaurens and S. caudata gums, followed by transformation of the resulting hexose into 6-deoxy-6-iodohexose residues, affords modified polysaccharides that undergo depolymerization on treatment with zinc dust. The main products after reduction with sodium borohydride are hexenitolterminated oligosaccharides. Their structures have been assigned as members of a series of O-[α-L-rhamnopyranosyl]-(1 → 3)-1,2-dideoxyhex-1-enitol derivatives, with and without attendant β-D-galactopyranosyl substituents, on the basis of nuclear magnetic resonance and mass spectral data and compositional analysis of trideuteriomethylated derivatives. The structures of the polysaccharides have been reassessed in the light of these and other experiments, and may now be formulated as containing a backbone of alternating 4-linked α-D-galacturonic acid and 2-linked α-L-rhamnopyranose residues bearing a minimum of three types of side chains attached at specific sites. Characterization of some of the degradation products provides evidence that limited degradation had occurred during methylation of the glycuronans.

The Template Synthesis and Characterization of New Mono- and Dinuclear Podand Schiff Base Complexesof Scandium Group Elements

1998 ◽  
Vol 63 (3) ◽  
pp. 371-377 ◽  
Author(s):  
Emilia Luks ◽  
Wanda Radecka-Paryzek
Keyword(s):  
Schiff Base ◽  
Template Synthesis ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr ◽  
Elemental Analyses ◽  
Materials Used

The partial Schiff base condensation reactions between 2,6-diacetylpyridine and 1,3-phenylenediamine in the presence of scandium(III), yttrium(III) and lanthanum(III) ions as template agents afford new mono- and dinuclear hexadentate complexes of podate type, depending on the molar ratio of starting materials used in the synthesis. They were characterized by IR, UV-VIS, 1H NMR, and mass spectral data as well as by thermogravimetric and elemental analyses.

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