Determination of petroselinic acid inUmbelliflorae seed oils by combined GC and13 C NMR spectroscopy analysis

1990 ◽  
Vol 67 (10) ◽  
pp. 607-610 ◽  
Author(s):  
J. F. Mallet ◽  
E. M. Gaydou ◽  
A. Archavlis
Keyword(s):  
Nmr Spectroscopy ◽  
Petroselinic Acid ◽  
Seed Oils ◽  
Spectroscopy Analysis ◽  
C Nmr

Characterization of New Inorganic- Organic Hybrid Compounds: (C6H10N2).Cl2 (I), [C6H10N2]2ZnCl4 (II): Crystal Structure, Hirschfield Surface, IR and NMR spectroscopy Analysis.

2021 ◽  
Author(s):  
nejeh hannachi ◽  
faouzi hlel
Keyword(s):  
Nmr Spectroscopy ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
Absorption Bands ◽  
Monoclinic System ◽  
Xrd Pattern ◽  
Organic Hybrid ◽  
C Nmr

Abstract Two new organic-inorganic hybrid materials, (C6H10N2).Cl2 (I) and [C6H10N2]2ZnCl4 (II), have been synthesized by hydrothermal method and characterized by single-crystal X-ray diffraction and XRD pattern investigations. These two compounds are crystallized in the monoclinic system; C2/c space group. In the both structures, the anionic-cationic entities are interconnected by hydrogen bonding contacts and p-p Interaction forming three-dimensional networks. Intermolecular interactions were investigated by Hirshfeld surfaces and the contacts of the four different chloride atoms in (II) were compared. The vibrational absorption bands were identified by infrared spectroscopy. These compounds were also investigated by solid state 13C NMR spectroscopy.

scholarly journals Assessment of milk fat content in fat blends by 13 C NMR spectroscopy analysis of butyrate

Food Control ◽  
2018 ◽  
Vol 91 ◽  
pp. 231-236 ◽  
Author(s):  
Raffaele Sacchi ◽  
Antonello Paduano ◽  
Nicola Caporaso ◽  
Gianluca Picariello ◽  
Raffaele Romano ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Milk Fat ◽  
Fat Content ◽  
Spectroscopy Analysis ◽  
C Nmr

Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants

2002 ◽  
Vol 80 (10) ◽  
pp. 1279-1284 ◽  
Author(s):  
Saeed Ahmad ◽  
Anvarhusein A Isab ◽  
Herman P Perzanowski
Keyword(s):  
Ionic Strength ◽  
Nmr Spectroscopy ◽  
Key Words ◽  
Equilibrium Constants ◽  
Solvent Polarity ◽  
Approach To Equilibrium ◽  
Initial Concentration ◽  
C Nmr

Ligand scrambling reactions in cyano(thione)gold(I) complexes ([>C=S-Au-CN]) to form [Au(>C=S)2]+ and [Au(CN)2]– species have been investigated for a series of thiones in DMSO using 13C and 15N NMR spectroscopy. Rapid approach to equilibrium occurred and resulted in distinct signals for the [>C=S-Au-CN] and [Au(CN)2]– complexes, both in 13C and 15N NMR. Equilibrium constants (Keq) were determined for scrambling of all the complexes by integrating the CN resonances in the 13C NMR recorded at 298 K. The influence of various factors (initial concentration, ionic strength, temperature, and solvent polarity) on the Keq value was examined for a representative complex (ImtAuCN (Imt = Imidazolidine-2-thione)).Key words: cyanogold(I) complexes, thiones, ligand scrambling, NMR, Keq.

Strukturermittlung der Reduktionsprodukte von Pyridostigmin mit NaBH4 / Determination of the Structure of Products of the Reduction of Pyridostigmine with NaBH4

1985 ◽  
Vol 40 (10) ◽  
pp. 1401-1408
Author(s):  
Volker Horstmann ◽  
Günter Häfelinger
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Structure ◽  
Main Product ◽  
Reaction Conditions ◽  
C Nmr

The chemical structure of 5 different products of pyridostigmine obtained by reduction with NaBH4 was determined by GC-MS and subsequently confirmed by means of 1H and 13C NMR spectroscopy. Reaction conditions leading almost exclusively to the main product: 3-[(N,N-dimethyl)-carbamoyl]-1-m ethyl-1,2,5,6-tetrahydropyridine (4) have been determined.

Notizen: Einfache Bestimmung der Substituentenposition im Pyrrolring von Pyrrolo[2,3-d] Pyrimidinen und 7-Desazapurinnucleosiden durch 13C-NMR / Simple Determination of the Position of Substitution in the Pyrrol Ring of Pyrrolo[2,3-d]pyrimidines and 7-Deazanucleosides Using 13C NMR

1977 ◽  
Vol 32 (8) ◽  
pp. 958-960 ◽  
Author(s):  
Uwe Lüpke ◽  
Frank Seela
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Side Chains ◽  
C Nmr

The position of substituents at C-5 or C-6 of pyrrolo[2,3-d]pyrimidines can be determined by 13C NMR spectroscopy. The method can also be used for 7-deazanucleosides and allows the assignment of the position of side chains.

Identification and quantitative determination of carbohydrate molecules in Greek honey by employing 13C NMR spectroscopy

2015 ◽  
Vol 7 (14) ◽  
pp. 5962-5972 ◽  
Author(s):  
Aristea Kazalaki ◽  
Maria Misiak ◽  
Apostolos Spyros ◽  
Photis Dais
Keyword(s):  
Nmr Spectroscopy ◽  
Quantitative Determination ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
C Nmr

A methodology based on 13C NMR spectroscopy was employed to detect and quantify fourteen mono-, di- and trisaccharide molecules in authentic Greek honey samples with no prior separation.

scholarly journals Determination of malate‐aspartate shuttle activity in intact hearts using 13 C NMR spectroscopy and modeling

2009 ◽  
Vol 23 (S1) ◽  
Author(s):  
Ming Lu ◽  
Gerald Saidel ◽  
Xin Yu
Keyword(s):  
Nmr Spectroscopy ◽  
Malate Aspartate Shuttle ◽  
C Nmr

scholarly journals Determination of C-23 Configuration in (20R)-23-Hydroxycholestane Side Chain of Steroid Compounds by 1H and 13C NMR Spectroscopy

2013 ◽  
Vol 8 (9) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Alla A. Kicha ◽  
Anatoly I. Kalinovsky ◽  
Alexander S. Antonov ◽  
Oleg S. Radchenko ◽  
Natalia V. Ivanchina ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Side Chain ◽  
Side Chains ◽  
Model Compounds ◽  
1H And 13C Nmr ◽  
C 23 ◽  
C Nmr

Epimeric (20 R,23 R)- and (20 R,23 S)-23-hydroxycholestane steroids were synthesized. Their structures were elucidated by extensive 1H and 13C NMR spectroscopy and application of the Mosher's method. All proton and carbon signals of the side chains were assigned. Based on these assignments spectral data allow the determination of the C-23 stereochemistry of (20 R)-23-hydroxycholestane side chains of the new natural steroids by comparison with spectra of the obtained model compounds. As a result, the C-23 configuration of two steroid compounds from the starfishes Lethasterias nanimensis chelifera and Lethasterias fusca was established.

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