𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C NMR spectra of pyridinium betaines and related compounds

✍ Scribed by Yoshito Takeuchi; Nicholas Dennis

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
652 KB
Volume
8
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

^13^C NMR spectra of 1‐methyl‐, 1‐phenyl‐ and 1, 6‐dimethyl‐pyridinium‐3‐oxide, 3‐methylphthalazinium 1‐oxide and anhydro‐3‐methanesulphonamido‐1‐methylpyridinium hydroxide, together with the corresponding amines and quaternary salts, were determined with and without proton noise‐decoupling. The assignment of resonances was based on the analysis of the fine splitting pattern caused by long range couplings whenever appropriate. A procedure for the estimation of chemical shifts of the salts and betaines is proposed.

📜 SIMILAR VOLUMES

13C NMR spectra of benzofuroxan and rela
13C NMR spectra of benzofuroxan and related compounds
✍ F. A. L. Anet; Issa Yavari 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 296 KB

## Abstract The ^13^C n.m.r. spectrum of benzofuroxan at −15°C is assigned on the basis of selective decoupling experiments and by comparison with the ^13^C chemical shifts of model compounds. The ^13^C spectra were also measured in trifluoroacetic acid as a solvent. From the temperature dependence

Carbon-13 NMR spectra of retinal1 and it
Carbon-13 NMR spectra of retinal1 and its related compounds
✍ Yoshio Inoue; Akio Takahashi; Yasuo Tokitô; Riichirô Chûjô; Yasuhiro Miyoshi 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 English ⚖ 386 KB

NMR spectra of all-trans retinal, and vitamin A, were measured by the pulse Fourier transform method in CCI,. All peaks in these spectra were assigned from considerations of chemical shifts, half proton-decoupled spectra, spin-lattice relaxation times and induced chemical shift by the addition of sh

Carbon-13 NMR spectra of DDT, its analog
Carbon-13 NMR spectra of DDT, its analogues and related compounds
✍ R. Kh. Freidlina; V. I. Dostovalova; N. A. Kuz'mina; E. C. Chukovskaya 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 581 KB

## Abstract Carbon‐13 NMR spectra of mono‐ and disubstituted aromatic compounds including DDT, its analogues, homologues, derivatives and certain model compounds have been studied. The Savitsky scheme of carbon chemical shifts in disubstituted benzenes is applicable to these compounds. The data obt

13C NMR spectra of wedeloside and relate
13C NMR spectra of wedeloside and related kaurenoid derivatives
✍ I. A. S. Lewis; J. K. MacLeod 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 453 KB

## Abstract The ^13^C NMR spectra of the diterpenoid aminoglycoside wedeloside and certain of its derivatives, representatives of a new kaurenoid series, have been assigned. Shift calculations and labelling experiments have established a general substituent additivity relationship for chemical shif