/sup 13/C NMR spectra of cyclic nitrones. 2. 1- and 4-substituted 2,2,5,5-tetramethyl-3-imidazoline 3-oxides

Journal Article · Thu Aug 01 00:00:00 EDT 1985 · Chem. Heterocycl. Compd. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00504212· OSTI ID:6181311

Grigor'ev, I A; Shchukin, G I; Martin, V V; Mamatyuk, V I

The chemical shift of the carbon atom of the nitrone group in the /sup 13/C NMR spectra of 3-imidazoline 3-oxides lies in the region of 117-152 ppm and depends on the electronic effect of the substituents at positions 1, 4, and 5 of the heterocycle. Increase in the electron-withdrawing character of the substituent at these positions leads to an upfield shift of the signal for the nitrone carbon atom, and this corresponds to the increase in electron density on it.

• Research Organization: Novosibirsk Institute of Organic Chemistry, USSR
• OSTI ID: 6181311
• Journal Information: Chem. Heterocycl. Compd. (Engl. Transl.); (United States), Journal Name: Chem. Heterocycl. Compd. (Engl. Transl.); (United States) Vol. 21:2; ISSN CHCCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AZOLES
BINDING ENERGY
CARBON
CHALCOGENIDES
CHARGE DISTRIBUTION
CHEMICAL REACTIONS
CHEMICAL SHIFT
COUPLING
COUPLING CONSTANTS
DECARBOXYLATION
ELECTRON TRANSFER
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
FERMIONS
HETEROCYCLIC COMPOUNDS
HYDROGEN 1
HYDROGEN ISOTOPES
HYDROGEN TRANSFER
IMIDAZOLES
INTERMEDIATE COUPLING
ISOTOPES
J-J COUPLING
LEPTONS
LIGHT NUCLEI
MECHANICS
MOLECULAR ORBITAL METHOD
MOLECULAR STRUCTURE
NMR SPECTRA
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
QUANTUM MECHANICS
SPECTRA
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
VALENCE