scholarly journals Synthesis, Spectral Characterization and Nematicidal activity studies of 2-[(2 -Nitrophenylimino) Methyl] Phenol and 2-[(4- Nitrophenyliminomethyl)]phenol Ligands and their FE(II) and NI(II) Complexes

2021 ◽  
Vol 4 (1) ◽  
pp. 202-211
Author(s):  
MS Iorungwa ◽  
GB Asaar ◽  
EN Iornumbe ◽  
PD Iorungwa ◽  
OM Fayomi ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Metal Complexes ◽  
1H Nmr ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Root Knot Nematode ◽  
Microwave Assisted ◽  
Nmr Data ◽  
L1 And L2 ◽  
Microwave Assisted Method

Four complexes of Fe(II) and Ni(II) with2-[(2 -nitrophenylimino) methyl] phenol(L1) and 2-[(4- nitrophenyliminomethyl)] phenol(L2) Schiff bases have been prepared via the microwave assisted method. The ligands and their corresponding complexes were characterized on the basis of physical properties, elemental analysis, MS, FTIR, 1H-NMR and 13C-NMR spectroscopy and electronic spectra. The FTIR spectra of the complexes showed that the ligands L1 and L2 had bidentate character coordinating through the nitrogen and oxygen atoms. On coordination, results showed that the 1H-NMR and 13C-NMR data of L1 and L2 confirmed the formation of the complexes of Fe(II) and Ni(II). The probable coordination geometries of Fe(II) and Ni(II) were octahedral. All the metal complexes were found to be non-electrolytes in ethanol. Nematicidal studies proved that the ligands and their metals showed appreciable nematicidal properties against the root knot nematode Meloidogyne arenariawith the metal complexes exhibiting higher ability than the free ligands.

scholarly journals Secondary metabolites of three endemic Centaurea L. species

2014 ◽  
Vol 79 (11) ◽  
pp. 1355-1362 ◽  
Author(s):  
Vele Tesevic ◽  
Ivana Aljancic ◽  
Slobodan Milosavljevic ◽  
Vlatka Vajs ◽  
Iris Djordjevic ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Nmr Spectroscopy ◽  
Secondary Metabolites ◽  
Sesquiterpene Lactone ◽  
1H Nmr ◽  
13C Nmr ◽  
1H Nmr Spectroscopy ◽  
13C Nmr Spectroscopy ◽  
Esi Ms ◽  
Aerial Parts

The aerial parts of three endemic Centaurea L. species, namely C. tomorosii Micevski, C. soskae Hayek and C. galicicae Micevski, afforded sesquiterpene lactone cnicin (1) and seven flavonoids: apigenin (2), isokaempferide (3), hispidulin (4), eupatorin (5), cirsimaritin (6), santaflavone (7) and salvigenin (8). The structures of the isolated compounds were determined by UV, 1H NMR and 13C NMR spectroscopy and HR-ESI-MS spectrometry. 1H NMR spectroscopy was used as a method for quantitative analysis of sesquiterpene lactone cnicin.

New Heterocyclic Compounds from 1,2,4-triazoles Class with Potential Cytotoxic Activity

2017 ◽  
Vol 68 (11) ◽  
pp. 2503-2508 ◽  
Author(s):  
Laura Ileana Socea ◽  
Stefania Felicia Barbuceanu ◽  
Bogdan Socea ◽  
Constantin Draghici ◽  
Theodora Venera Apostol ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Cytotoxic Activity ◽  
Spectral Data ◽  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Heterocyclic Compounds ◽  
Cytotoxic Effect ◽  
13C Nmr Spectroscopy ◽  
New Compounds

Acylhydrazinecarbothioamides (2a,b) were synthesized by addition of 2-(5H-dibenzo[a,d][7]annulen-5-yl)acetohydrazide to different isothiocyanates. The new 1,2,4-triazol-3-thioles (3a,b) were synthesized by cyclization of new 2- acylhydrazinecarbothioamides (3a,b) in basic media. Alkylation of 1,2,4-triazole-3-thiols (3a-c) with ethyl bromide gave only S-substituted derivatives (4a-c). The structures of the synthesized compounds have been established on spectral data (IR, 1H-NMR and 13C-NMR spectroscopy) and elemental analysis. The cytotoxic effect of new compounds was evaluated using two alternative models on plant and invertebrate organisms.

scholarly journals Synthesis some 4-substituted 9,10-anthraquinones

2020 ◽  
Vol 8 (1) ◽  
pp. 58-65
Author(s):  
Vasyl Shupeniuk ◽  
Tetyana Taras ◽  
Oksana Sabadakh ◽  
Eugene Luchkevich ◽  
Yurii Kornii
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Coupling Reaction ◽  
13C Nmr Spectroscopy ◽  
Analysis Data ◽  
Elemental Analysis Data ◽  
Ullmann Coupling

New 4-substituted 9,10-anthraquinones (6 compouds) with amino derivations fragments were synthesized through the substitution of the bromaminic acid by amines using the Ullmann coupling reaction. The structures of the synthesized compounds were determined using LC-MS, 1H NMR, 13C NMR spectroscopy, and elemental analysis data.

11B- und 13C-NMR-Spektroskopie von nido-Hexaalkyl-2.3.4.5-tetracarbahexaboranen(6) / 11B- und 13C-NMR Spectroscopy of nido-Hexaalkyl-2,3,4,5-tetracarbahexaboranes(6)

1982 ◽  
Vol 37 (4) ◽  
pp. 412-419 ◽  
Author(s):  
Bernd Wrackmeyer
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Coupling Constants ◽  
Triple Resonance ◽  
Triple Resonance Experiments ◽  
Nmr Data ◽  
Nuclear Shielding ◽  
C Nmr

11B and 13C NMR data of peralkylated nido-2,3,4,5-tetracarbahexaboranes(6) are reported. Application of selective heteronuclear triple resonance experiments 13C{1H,11B} enables to assign the structures of various isomers. The magnitude of the coupling constants 1J(11B11B), 1J(13C11B) and 1J(13C13C) is in accord with expectations based on the conception of bonding in carboranes. The comparison of δ11B and δ13C data of the nido- 2,3,4,5-tetracarboranes(6) with δ13C-data of corresponding non-classical carbocations shows the influence of charge upon the nuclear shielding of carbon in the latter.

Stereoregularity of poly(2-vinylpyridine) determined by 1H-NMR and 13C-NMR spectroscopy

1976 ◽  
Vol 14 (6) ◽  
pp. 1475-1484 ◽  
Author(s):  
Kei Matsuzaki ◽  
Taiichi Kanai ◽  
Tetsuyuki Matsubara ◽  
Susumu Matsumoto
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
13C Nmr ◽  
13C Nmr Spectroscopy
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