ChemInform Abstract: Determination of the Sign of a One-bond15N-15N Spin-Spin Coupling Constant for a trans-Diazene by Selective15N Decoupling Experiments in13C NMR Spectroscopy

1986 ◽  
Vol 17 (35) ◽  
Author(s):  
Y. KURODA ◽  
Y. FUJIWARA ◽  
A. KUWAE ◽  
K. MATSUSHITA
Keyword(s):  
Nmr Spectroscopy ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Spin Spin Coupling

Assignment of cis-trans Geometry in Diastereomeric 2-Benzyl-4-methyl-1,3,2-dioxaphosphorinans and their 2-Oxo- and 2-Seleno-Derivatives

1975 ◽  
Vol 30 (9-10) ◽  
pp. 710-715 ◽  
Author(s):  
W. J. Stec ◽  
K. Lesiak ◽  
D. Mielczarek ◽  
B. Stec
Keyword(s):  
Nmr Spectroscopy ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Geometrical Isomers ◽  
Benzyl Halides ◽  
New Compounds ◽  
Cis And Trans ◽  
Spin Spin Coupling ◽  
C Nmr

MICHAELIS-ARBUSOV reaction of diastereoisomeric 2-methoxy-4-methyl-1,3,2-dioxaphosphorinans with benzyl halides is non-stereospecific. Cis- and trans-2-benzyl-2-oxo-4-methyl-1,3,2-dioxaphosphorinans were separated and analysed by means of IR, 31P and 13C NMR spectroscopy. 2-Benzyl-2-seleno-4-methyl-1,3,2-dioxaphosphorinans were synthesized and stereospecifically converted to 2-oxo-analogues. Stereochemistries are assigned to the geometrical isomers of all new compounds described in this paper. Application of direct spin-spin coupling constant values for structural elucidation is emphasized.

scholarly journals Stereochemical Determination of Five-Membered Cyclic Ether Acetogenins Using a Spin-Spin Coupling Constant Approach and DFT Calculations

Marine Drugs ◽  
2014 ◽  
Vol 12 (7) ◽  
pp. 4031-4044 ◽  
Author(s):  
Adrián Gutiérrez-Cepeda ◽  
Antonio Daranas ◽  
José Fernández ◽  
Manuel Norte ◽  
María Souto
Keyword(s):  
Dft Calculations ◽  
Cyclic Ether ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Spin Spin Coupling

An estimate of the spin–spin coupling constant, 1J(1H,13C), in gaseous benzene

1996 ◽  
Vol 74 (8) ◽  
pp. 1524-1525 ◽  
Author(s):  
Ted Schaefer ◽  
Guy M. Bernard ◽  
Frank E. Hruska
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Dielectric Constant ◽  
Magnetic Resonance ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling ◽  
Gaseous Benzene

An excellent linear correlation (r = 0.9999) exists between the spin–spin coupling constants 1J(1H,13C), in benzene dissolved in four solvents (R. Laatikainen et al. J. Am. Chem. Soc. 117, 11006 (1995)) and Ando's solvation dielectric function, ε/(ε – 1). The solvents are cyclohexane, carbon disulfide, pyridine, and acetone. 1J(1H,13C)for gaseous benzene is predicted to be 156.99(2) Hz at 300 K. Key words: spin–spin coupling constants, 1J(1H,13C) for benzene in the vapor phase; spin–spin coupling constants, solvent dielectric constant dependence of 1J(1H,13C) in benzene; benzene, estimate of 1J(1H,13C) in the vapor; nuclear magnetic resonance, estimate of 1J(1H,13C) in gaseous benzene.

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