𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Spin–spin couplings in doubly 15N labelled urea and 1,3-dimethylurea

✍ Scribed by P. Stilbs; S. Forsén

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

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ^1^H n.m.r. spectra of doubly ^15^N labelled urea and 1,3‐dimethylurea have been analysed with the aid of computer simulation. ^1^H^1^H, ^1^H^15^N, ^15^N^15^N and ^13^C^15^N (from ^13^C Ft spectra) couplings are reported.

📜 SIMILAR VOLUMES

Nuclear spin–spin coupling between 15N a
Nuclear spin–spin coupling between 15N and 13C in an azomethine ylide and related compounds
✍ Hans Fritz; Daniel Clerin; Jean-Pierre Fleury 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 239 KB

## Abstract ^13^C^15^N coupling constants of a stable azomethine ylide, a 2‐aza‐1,3‐diene and an O‐tosyloxime have been measured. The large one‐bond coupling constants (21·3 and 21·6 Hz) observed for the azomethine ylide prove the dipolar structure of this compound. For the other two compounds, tw

15N,15N spin–spin coupling constants acr
15N,15N spin–spin coupling constants across N—H—N and N—H+—N hydrogen bonds: can coupling constants provide reliable estimates of N—N distances in biomolecules?
✍ Janet E. Del Bene; S. Ajith Perera; Rodney J. Bartlett 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 140 KB

Predictive quantum chemical methods based upon coupled cluster theory of spin-spin coupling constants offer a direct tool to explore a variety of questions concerning the relationship between coupling constants and intermolecular distances, molecular orientation, changes in hybridization and related

Inter- and intra-molecular hydrogen bond
Inter- and intra-molecular hydrogen bonding effects on geminal 15N, 1H spin coupling and 15N chemical shifts in pyridine derivatives
✍ W. Holzer; W. Von Philipsborn 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 362 KB 👁 1 views

The two-bond "N,H coupling constant in 3,5dimethylpyridine was determined in 30 solvents and shown to vary between -11 and -3 Hz. An increasing ability of the solvent to form hydrogen bonds causes a steady decrease in I \*J("N,H) I , which is also observed with some selected pyridine derivatives wit

Measurement of Cross Correlation between
Measurement of Cross Correlation between Dipolar Coupling and Chemical Shift Anisotropy in the Spin Relaxation of13C,15N-Labeled Proteins
✍ Ranajeet Ghose; Kai Huang; James H Prestegard 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 259 KB

We present a simple method for extracting interference effects between chemical shift anisotropy (CSA) and dipolar coupling from spin relaxation measurements in macromolecules, and we apply this method to extracting cross-correlation rates involving interference of amide 15N CSA and 15N-1H dipolar c