Low-Temperature 13C Magnetic Resonance. 9.Steric Effects for Methyl Chemical Shift Tensors in Methylcyclohexanes

1995 ◽  
Vol 117 (32) ◽  
pp. 8441-8446 ◽  
Author(s):  
Arlen Soderquist ◽  
Julio C. Facelli ◽  
Walter J. Horton ◽  
David M. Grant
Keyword(s):  
Magnetic Resonance ◽  
Chemical Shift ◽  
Low Temperature ◽  
Steric Effects ◽  
Chemical Shift Tensors

Deshielding γ–gauche effects in 13C magnetic resonance: a comparison of the conformational behaviour of the acetyl group in cyclohexane and 5-substituted-1,3-dioxane systems

1984 ◽  
Vol 62 (7) ◽  
pp. 1308-1311 ◽  
Author(s):  
G. W. Buchanan ◽  
S. H. Preusser ◽  
V. L. Webb
Keyword(s):  
Magnetic Resonance ◽  
Chemical Shift ◽  
Low Temperature ◽  
Direct Measurement ◽  
Carbonyl Carbon ◽  
Acetyl Group ◽  
Carbon Chemical Shift ◽  
Reported Data

Low temperature (173 K) 13C spectra of acetylcyclohexane, 1-acetyl-1-methylcyclohexane, and 5-acetyl-5-methyl-1,3-dioxane are reported. Data permit the first direct measurement of −ΔG0 for the acetyl group bonded to cyclohexane. The value obtained, 1.02 ± 0.05 kcal/mol in CS2–CD2Cl2 solution, is considerably lower than that determined by equilibration methods. Factors contributing to observed axial–equatorial carbonyl carbon chemical shift differences for substituted cyclohexanes and 1,3-dioxanes are discussed.

A Circular-Disk Dielectric Resonator for Low-Temperature Magnetic Resonance Measurements at Millimeter and Sub-Millimeter Wavelengths

2008 ◽  
Vol 67 (14) ◽  
pp. 1239-1245
Author(s):  
V. N. Derkach ◽  
T. V. Bagmut ◽  
R. V. Golovashchenko ◽  
V. G. Korzh ◽  
S. V. Nedukh ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Low Temperature ◽  
Dielectric Resonator ◽  
Circular Disk ◽  
Millimeter Wavelengths

scholarly journals Modeling Small Structural and Environmental Differences in Solids with 15 N NMR Chemical Shift Tensors

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Luther Wang ◽  
Alexander B. Elliott ◽  
Sean D. Moore ◽  
Gregory J. O. Beran ◽  
Joshua D. Hartman ◽  
...  
Keyword(s):  
Chemical Shift ◽  
Nmr Chemical Shift ◽  
Chemical Shift Tensors
Sign in / Sign up

Export Citation Format

Share Document