𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Nitrogen-15 nuclear magnetic resonance spectroscopy. Natural abundance nitrogen-15 spectra of the cis and trans isomers of secondary alkylformamides

✍ Scribed by Hiroshi Nakanishi; John D. Roberts

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
577 KB
Volume
15
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ^15^NMR chemical shifts were measured of a number of N‐substituted formamides and acetamides at the natural abundance level. The ratios of the cis and trans isomers for several N‐alkylformamides were also determined. Substituent effects on the ^15^N chemical shifts of formamides are compared with those of some other nitrogen‐containing compounds. There is a consistent pattern of behavior of the one bond spin–spin coupling constants [^1^J(^15^NH)] wherein the trans isomers of N‐alkylformamides are larger than those of the cis isomers.

📜 SIMILAR VOLUMES

Nitrogen-15 magnetic resonance spectrosc
Nitrogen-15 magnetic resonance spectroscopy XVI—natural-abundance spectra of aromatic amines
✍ Robert L. Lichter; John D. Roberts 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 English ⚖ 379 KB

## Abstract The ^15^N chemical shifts of aniline, the toluidines, xylidines, and several halogen and oxygen substituted anilines have been measured at the natural abundance level of ^15^N. Substituent parameters obtained by multiple regression analysis show that the methyl group induces comparable

Nitrogen-15 nuclear magnetic resonance s
Nitrogen-15 nuclear magnetic resonance spectroscopy. Chemical shifts of methyl substituted cis-decahydroquinolines
✍ Friedrich W. Vierhapper; George T. Furst; Robert L. Lichter 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 446 KB

## Abstract ^15^N Chemical shifts of __cis__‐decahydroquinoline, __N__‐methyl‐__cis__‐decahydroquinoline, and of 19 methyl substituted NH‐ and NCH~3~‐__cis__‐decahydroquinolines are reported. Shift values of conformationally homogeneous compounds can be used to determine the chemical shifts of the