FT-IR, UV–vis, 1H and 13C NMR spectra and the equilibrium structure of organic dye molecule disperse red 1 acrylate: A combined experimental and theoretical analysis

2011 ◽  
Vol 83 (1) ◽  
pp. 561-569 ◽  
Author(s):  
Mehmet Cinar ◽  
Ali Coruh ◽  
Mehmet Karabacak
Keyword(s):  
Theoretical Analysis ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Equilibrium Structure ◽  
Organic Dye ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Ft Ir ◽  
Disperse Red 1 ◽  
Dye Molecule

scholarly journals Synthesis of Novel N-Acylhydrazones and Their C-N/N-N Bond Conformational Characterization by NMR Spectroscopy

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4908
Author(s):  
Rubina Munir ◽  
Noman Javid ◽  
Muhammad Zia-ur-Rehman ◽  
Muhammad Zaheer ◽  
Rahila Huma ◽  
...  
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Room Temperature ◽  
Aromatic Aldehydes ◽  
Spectral Studies ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Mass Spectral ◽  
Nmr Techniques ◽  
Ft Ir

In this article, a synthesis of N’-(benzylidene)-2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazides and their structural interpretation by NMR experiments is described in an attempt to explain the duplication of some peaks in their 1H- and 13C-NMR spectra. Twenty new 6-methyl-1H-pyrazolo[3,4-b]quinoline substituted N-acylhydrazones 6(a–t) were synthesized from 2-chloro-6-methylquinoline-3-carbaldehyde (1) in four steps. 2-Chloro-6-methylquinoline-3-carbaldehyde (1) afforded 6-methyl-1H-pyrazolo[3,4-b]quinoline (2), which upon N-alkylation yielded 2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetate (3). The hydrazinolysis of 3 followed by the condensation of resulting 2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazide (4) with aromatic aldehydes gave N-acylhydrazones 6(a–t). Structures of the synthesized compounds were established by readily available techniques such as FT-IR, NMR and mass spectral studies. The stereochemical behavior of 6(a–t) was studied in dimethyl sulfoxide-d6 solvent by means of 1H NMR and 13C NMR techniques at room temperature. NMR spectra revealed the presence of N’-(benzylidene)-2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazides as a mixture of two conformers, i.e., E(C=N)(N-N) synperiplanar and E(C=N)(N-N)antiperiplanar at room temperature in DMSO-d6. The ratio of both conformers was also calculated and E(C=N) (N-N) syn-periplanar conformer was established to be in higher percentage in equilibrium with the E(C=N) (N-N)anti-periplanar form.

Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines

2018 ◽  
Vol 69 (1) ◽  
pp. 64-69
Author(s):  
Liviu Birzan ◽  
Mihaela Cristea ◽  
Constantin C. Draghici ◽  
Alexandru C. Razus
Keyword(s):  
Double Bond ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Pyridinium Salts ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Pyrylium Salts

The 1H and 13C NMR spectra of several 2,6-diheteroarylvinyl heterocycles containing 4-azulenyl moiety were recorded and their proton and carbon chemical shifts were compared with those of the compounds without double bond between the heterocycles. The influence of the nature of central and side heterocycles, molecule polarization and anisotropic effects were revealed. The highest chemical shifts were recorded for the pyrylium salts and the lowest at pyridines, but in the case of the pyridinium salts, the protons chemical shifts at the central heterocycle are more shielded due to a peculiar anisotropy of the attached vinyl groups.

Studies of the neutral trisaccharides of goat (Capra hircus) colostrum and of the one- and two-dimensional 1H and 13C NMR spectra of 6′-N-acetylglucosaminyllactose

1994 ◽  
Vol 262 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Tadasu Urashima ◽  
William A. Bubb ◽  
Michael Messer ◽  
Yuhnagi Tsuji ◽  
Yasuko Taneda
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Capra Hircus ◽  
13C Nmr Spectra ◽  
Two Dimensional ◽  
1H And 13C Nmr ◽  
The One

ChemInform Abstract: Diels-Alder Adducts of a Spirocyclopentenotriazoloazodienophile. Assignment of Their 1H and 13C NMR Spectra.

ChemInform ◽  
2010 ◽  
Vol 27 (50) ◽  
pp. no-no
Author(s):  
N. E. ALEXANDROU ◽  
G. E. MERTZANOS ◽  
J. STEPHANIDOU-STEPHANATOU ◽  
C. A. TSOLERIDIS
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Diels Alder ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr
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