13CNMR chemical shiftsNeoflavonoids5,7‐Dihydroxy‐ and 5,7‐dimethoxy‐4‐arylcoumarins2D NMR13CNMR chemical shiftsNeoflavonoids5,7‐Dihydroxy‐ and 5,7‐dimethoxy‐4‐arylcoumarins2D NMRThe 13C NMR resonances of some 5,7-dihydroxy- and 5,7-dimethoxy-4-arylcoumarins were assigned by two-...
Carbon-13 NMR Shift Assignments of Amines and Alkaloids || Isoquinolines M Shamma,DM Hindenlang 被引量: 0发表: 1979年 E2F1 represses β-catenin transcription and is antagonized by both pRB and CDK8 The E2F1 transcription factor can promote proliferation or apoptosis when activated, and is a key...
A table of typical chemical shifts in C-13 NMR spectra carbon environment chemical shift (ppm) C=O (in ketones) 205 - 220 C=O (in aldehydes) 190 - 200 C=O (in acids and esters) 170 - 185 C in aromatic rings 125 - 150 C=C (in alkenes) 115 - 140 RCH 2 OH 50 - 65 RCH ...
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 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 ... The carbon-13 NMR chemical shift of poly (1-butene) referring to that of 2,4,6,8,10,12,14,16,18-nonaeviylaonada...
The 13C NMR chemical shift of sp3 carbon atoms situated in the α position relative to the double bond in acyclic alkenes was estimated with multilayer feedforward artificial neural networks (ANNs) and multilinear regression (MLR), using as structural descriptors a topo-stereochemical code which cha...
The 13C NMR chemical shift of sp2 carbon atoms in acyclic alkenes was estimated with multilayer feedforward artificial neural networks (ANNs) and multilinear regression (MLR), using as structural descriptors a vector made of 12 components encoding the environment of the resonating carbon atom. The ...
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...
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...
The solid-state C NMR spectra of some substituted iron carbonyl complexes have been analyzed to give values for the carbonyl carbon chemical shift tensor components. It is shown that the lowest frequency tensor component and the chemical shift anisotropy correlate with the degree of bonding asymmetry...