13C NMR chemical shifts for some 3-heterosubstituted 2-methylpropenes are reported. The -methylene chemical shifts show excellent linear correlations with the corresponding data for some substituted carbonyl compounds (propanones, methyl acetates and N,N-diethylacetamides). Their estimated ...
Hindenlang, "Carbon-13 NMR Shift Assignments of Amines and Alkaloids", Plenum Press, New York, p 111 (1979).Shamma et al., Carbon 13 NMR Shift Assignments of Amines and Alkaloids, p. 206.Shamma, M.; Carbon 13 NMR Shift Assignments of Amines and Alkaloids , Plenum Press: New York, ...
Chemical Shift Ranges in Carbon‐13 NMR Spectroscopy von W. Bremser, B. Franke und H. Wagner, XV, 971 S., Preis DM 220,00, Verlag Chemie, Weinheim — Deerfield Beach, Florida — Basel 1982No abstract is available for this article.doi:10.1002/ardp.19833160521...
A table of typical chemical shifts in C-13 NMR spectra CH3 CH2 The external magnetic field experienced by the carbon nuclei is affected by the electronegativity of the atoms attached to them. The effect of this is that the chemical shift of the carbon increases if you attach an atom like ...
16, No.9, pp (1984) The Carbon-13 NMR Chemical Shift of Poly(1-butene) Referring to that of 2,4,6,8,10,12,14,16,18-Nonaethylnonadecane and a Comparison of the Chemical Shifts between Poly(1-butene) and Polypropylene Tetsuo ASAKURA,*1 Kazuo OMAKI, Shan-Nong ZHu,*· 1 and ...
The 13C NMR spectrum of the H-5-1 membranes exhibits a slight rightward shift in the aromatic ether peak, demonstrating a change in the corresponding chemical environment which may be attributed to substantial hydrogen bonding between the hydroxyl groups in HZIF-8 and the PIM-1 chains. The ...
(MAS NMR) experiments was recorded on a Bruker Advance III 400 NMR spectrometer equipped with a superconducting magnet (89 mm wide-bore 9.4 T) and a HX probe (1.3 mm) at a Larmor frequency of 105.8 MHz. Single pulses were applied in acquiring23Na NMR data at a spinning speed of 80 ...
The carbon chemical shift tensors of the carbonyl and thiocarbonyl groups of acetamide, thioacetamide, thioacetanilide, 4′-methoxyacetanilide, and 4′-methoxythioacetanilide have been experimentally determined using dipolar – chemical shift solid-state 13C NMR spectroscopy. The magnitudes of the three...
In spite of the importance of lithiated organic compounds in organic synthesis and its high sensitivity, 7Li has not contributed so much to the development of NMR, like 1 H, 13 C, 17 O and 15 N because its predicted chemical shift range (5ppm) is the smallest of the periodic table [...
Carbon-13 NMR spectra of carotenoids 101 Table 2. "C-NMR datafor the e-end oflutein and related models 2 3 4 5 6 8 Lutein (VII) 34.0 44.7 65.9 125.6 137.8 55.0 8 trans diol (VIII) 34.2 45.5 66.4 125.9 137.8 55.0 8 cis diol (IX) 35.2 41.3 67.3 126.0 138.0 55.0t 8 a-isophor...