𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effects of simultaneous 13C1H and 13C11B decoupling on the carbon-13 n.m.r. spectra of some organoboron compounds

✍ Scribed by M. Mazurek; T. M. Mallard; P. A. J. Gorin

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
254 KB
Volume
9
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

^13^C FT n.m.r. spectra were obtained from borates of methyl α‐D‐glucopyranoside, triethylboron, sodium tetraphenylboron and 1‐butaneboronic acid employing a simultaneous ^1^H and ^11^B decoupling network. The effectiveness of the system was evident using the three latter organoboron compounds. Since no diminution in line broadening of signals occurred in the spectrum of the sugar borate, the absence of ^13^CO^11^B coupling was indicated. This finding was confirmed by comparing the effects of varying the temperatures of sugar borates and triethylboron on their conventional ^13^C n.m.r. spectra.

📜 SIMILAR VOLUMES

Carbon-13 isotope effect on proton decou
Carbon-13 isotope effect on proton decoupled 13C and 31P n.m.r. spectra of bis(diphenylphosphino)acetylene
✍ R. Paasonen; J. Enqvist; M. Karhu; E. Rahkamaa; M. Sundberg; R. Uggla 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 196 KB

## Abstract High resolution proton decoupled ^13^C and ^31^P n.m.r. spectra of bis(diphenylphosphino)acetylene in (CD~3~)~2~SO and CDCl~3~ are analysed as ABX spectra to give the relative chemical shifts of the ^13^C and ^31^P nuclei as well as the spin–spin coupling constants ^3^__J__(PP) and ^__n

13C n.m.r. spectra of some thiobenzamide
13C n.m.r. spectra of some thiobenzamides. Correlation between 13C and 1H n.m.r. spectra and signal assignments of syn and anti CH2 groups
✍ C. Piccinni-Leopardi; O. Fabre; D. Zimmermann; J. Reisse; F. Cornea; C. Fulea 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 254 KB

## Abstract ^13^C n.m.r. spectra of a series of __N__,__N__‐disubstituted thioamides have been recorded and signal assignments were performed. Separate signals are observed for methylene groups fixed on the nitrogen atom. Since the carbon atom __syn__ to the thiocarbonyl sulfur resonates at higher

N.m.r. studies on aromatic compounds. I—
N.m.r. studies on aromatic compounds. I—13C n.m.r. spectra of some mono- and disulpho-substituted hydroxycarboxylic acids
✍ Kauko Räisänen; Lauri H. J. Lajunen 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 372 KB 👁 1 views

## Abstract Carbon‐13 n.m.r. spectra of 3‐hydroxy‐4‐sulpho‐2‐naphthoic, 3‐hydroxy‐5‐sulpho‐2‐naphthoic, 3‐hydroxy‐7‐sulpho‐2‐naphthoic, 5‐sulphosalicylic, 3‐hydroxy‐5,7‐disulpho‐2‐naphthoic, 1‐hydroxy‐4,7‐disulpho‐2‐naphthoic, and 3,5‐disulphosalicylic acids were recorded with and without proton no

The effect of O-methylation on chemical
The effect of O-methylation on chemical shifts in the 1H- and 13C-n.m.r. spectra of cyclic polyols
✍ Stephen J. Angyal; Léon Odier 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 361 KB

The 'H-and "C-n.m.r. spectra of seven in&lo1 methyl ethers were recorded and assigned. They were classified into five types, and the effect of 0methyl&ion on the chemical shifts of each type is discussed. NOTE ADDED IN PROOF Type F, not encountered in our work, occurs in 1,6-anhydro-3-O-methyl-& D

Determination of 3J(31P31P) and 13C31P c
Determination of 3J(31P31P) and 13C31P coupling constants in 1,6-diphosphatriptycene from carbon-13 n.m.r. lone pairs effects on 13C31P couplings
✍ S. Sørensen; H. J. Jakobsen 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 342 KB

## Abstract The ^31^P^31^P and ^13^C^31^P coupling constants in 1,6‐diphosphatriptycene have been obtained from analysis of its proton decoupled ^13^C n.m.r. spectra. More accurate data, however, resulted from simultaneous analysis of the proton decoupled ^13^C spectra and ^31^P(^13^C) satellite

Substituent effects of the N,N-dimethyl-
Substituent effects of the N,N-dimethyl- sulfamoyl group on the 1H and 13C NMR spectra of positional isomers of quinolines
✍ Andrzej Maślankiewicz; Maria J. Maślankiewicz; Krzysztof Marciniec 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 110 KB 👁 1 views

## Abstract The complete ^1^H and ^13^C NMR spectral assignments of seven positional isomers of __N__,__N__‐dimethylsulfamoylquinolines 2–8 and quinoline have been made using 1D and 2D NMR techniques, including COSY, HMQC and HMBC experiments. Δδ~H~ and Δδ~C~ substituent effects induced by the sulf