𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Carbon-13 chemical shifts of some model carboxylic acids and esters

✍ Scribed by P. A. Couperus; A. D. H. Clague; J. P. C. M. van Dongen

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
390 KB
Volume
11
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Selected model carboxylic acids and esters dissolved in deuteriochloroform have been studied by carbon‐13 nuclear magnetic resonance under standardized conditions. Assignments of the chemical shifts have been made for all samples, and the spin–lattice relaxation times and nuclear Overhauser effects measured for a few selected esters. The results are intended to provide a practical aid for the analysis of carboxylic acids and esters of a more complex nature (e.g. polymers, natural products, etc.).

📜 SIMILAR VOLUMES

13C chemical shifts of some model olefin
13C chemical shifts of some model olefins
✍ P. A. Couperus; A. D. H. Clague; J. P. C. M. van Dongen 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 360 KB 👁 1 views

## Abstract An extensive carbon‐13 nuclear magnetic resonance study of selected model olefins dissolved in deuteriochloroform has been carried out under standardized conditions. Assignments of the chemical shifts have been made. The influence of the nature of the solvent and the effect of changing

Carbon-13 NMR chemical shifts of 1-alkyl
Carbon-13 NMR chemical shifts of 1-alkyl-3(5)-cyano-1H-pyrazole-4-carboxylic acid esters
✍ George E. Babbitt; Michael P. Lynch; James R. Beck 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 199 KB

## Abstract A compilation of ^13^C NMR chemical shifts for 13 pairs of 3‐ and 5‐cyano‐substituted pyrazole regioisomers is reported. All of the ring carbon and cyano carbon ^13^C chemical shifts show a regular, predictable correlation with the particular isomer, whether 3‐cyano or 5‐cyano. These sh

Carbon-13 NMR spectra of adamantane carb
Carbon-13 NMR spectra of adamantane carboxylic acids and diamantane mono- and di-carboxylic acids and esters
✍ Milan Hájek; LuděK Vodička; Petr Trška; Vladimír Sklenář 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 257 KB 👁 1 views

Table 4. Predicted and observed" aryl carbon shieldings relative to benzene for the 4-substituted phenylsulphonyl moiety in cis-and trans-l-arylsulphonyl-2-~lcy~opropanes shielding (pprn) Compound cis trans No. C-1' C-2 and C-6' C-3' and C-5' C-4' C-1' C-2 and C 6 ' C-3' and C-5' C-4' Carbon-13 NMR

The determination of the COOH substiuent
The determination of the COOH substiuent effect for branched carboxylic acids from carbon-13 chemical shifts
✍ David H. Marr 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 330 KB 👁 1 views

## Abstract The carboxyl substituent effects for branched carboxylic acids have been determined by carbon‐13 Fourier ransform nuclear magnetic resonance of eighteen measured and reported branched acids. For α‐branched systems the substituent effects are α = 15.3 ppm, β = 2.6 ppm, γ = −1.9 ppm, δ =

Additivity of proton and carbon nmr chem
Additivity of proton and carbon nmr chemical shifts in protonated benzene carboxylic acids
✍ Daniel Bruck; Mordecai Rabinovitz 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 247 KB

## Abstract The additivity of the proton and carbon chemical shift increments due to structural changes in a series of conjugate acids derived from benzene polycarboxylic acids is reported. In the acids, two sets of increments had been applied, one to the __ortho__ diacids and one to acids which do