𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C NMR analysis of specifically labeled [13C] azobenzenes

✍ Scribed by Henry J. Shine; Witold Subotkowski


Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
257 KB
Volume
29
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

^13^C NMR chemical shifts and ^13^Cο£Ώ^13^C couplings for six specifically labeled [^13^C] azobenzenes are reported. Coupling magnitudes depend on the position of labeling and the nature of the substituents.


πŸ“œ SIMILAR VOLUMES


13C isotope effects on 1H chemical shift
✍ Mika Tiainen; Hannu Maaheimo; Pasi Soininen; Reino Laatikainen πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 187 KB

## Abstract The one‐ and two‐bond ^13^C isotope shifts, typically βˆ’1.5 to βˆ’2.5 ppb and βˆ’0.7 ppb respectively, in non‐cyclic aliphatic systems and up to βˆ’4.4 ppb and βˆ’1.0 ppb in glucose cause effects that need to be taken into account in the adaptive NMR spectral library‐based quantification of the

Synthesis of Specifically Labelled Gangl
✍ Lutz F. Tietze; Dirk Gretzke πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 324 KB πŸ‘ 1 views

Glycosidation of the lactose derivative 4 with [1-13 C]-sialyl sialic acid gave the trisaccharide 5 which was transformed into [1c-13 C]-GM 3 ([1c-13 C]-1). xanthate 3, prepared from enzymatically obtained [1-13 C]-FULL PAPER Scheme 2 Reagents and conditions: (a) PST, AgOTf, CH 3 CN/CH 2 Cl 2 , Οͺ70Β°

Synthesis of highly pure 14C-labelled DL
✍ Simon G. Patching πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 French βš– 124 KB πŸ‘ 1 views

## Abstract A number of synthetic approaches are assessed to prepare allantoin labelled with ^14^C given certain requirements and technical limitations. A method that fulfils these criteria is described to achieve the synthesis of highly pure ^14^C‐labelled allantoin with the label introduced to th

Synthesis of 4-13C and 3,5-13C labeled a
✍ Helmut Rumpel; Hans-Heinrich Limbach πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 French βš– 167 KB πŸ‘ 1 views

Aniline (IV), specifically 13C labeled in the 4-or in the 3,5-position (IVa and IVb), has been synthesized with 55% yield from I3C labeled pnitrophenol (11). The reduction of the NO2 group and the removal of the OH group was performed in one step by reduction and hydrogenolytic cleavage o f p-nitrop

13C/15N distance determination by CPMAS
✍ Maggy Hologne; JΓ©sus Raya; JΓ©rΓ΄me Hirschinger πŸ“‚ Article πŸ“… 2006 πŸ› John Wiley and Sons 🌐 English βš– 216 KB

The REDOR and CPMAS techniques are applied for measuring 13C-15N dipolar coupling constants in glycine. It is shown that the selective CP or SPECIFIC CP technique removes the coherent evolution of the spin system under homonuclear 13C-13C J couplings. While the large coupling constant (approximately