𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Determination of one-bond 14N13C coupling constants in amines using 13C T1ρ measurements

✍ Scribed by V. Mlynárik


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
190 KB
Volume
17
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

^13^C T~1ρ~ values measured for isobutylamine, diethylamine, pyrrolidine, piperidine and triethylamine yield one‐bond ^14^N^13^C coupling constants and ^14^N spin‐lattice relaxation times. A decrease of ^1^J(^14^N^13^C) was observed in sterically hindered secondary amines.


📜 SIMILAR VOLUMES


13C NMR: Stereochemical dependence of th
✍ J. Cantacuzene; R. Jantzen; M. Tordeux; C. Chachaty 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB

## Abstract The one‐bond coupling constant ^1^__J__ ^13^CH for the halogenated carbon in α‐halogenocyclohexanones is more important when the CH bond is in the equatorial then in the axial position. When a conformational equilibrium is present, the resulting coupling is a linear function of the eq

Simultaneous determination of one- and t
✍ Eetu Puttonen; Helena Tossavainen; Perttu Permi 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 304 KB

Four simple and sensitive HNCO-based methods for measurement of 1J(C'Calpha), 1J(NCalpha) and 2J(NCalpha) coupling constants in protein main chains are presented. Three of these experiments enable the simultaneous measurement of 1J(C'Calpha), 1J(NCalpha) and 2J(NCalpha) couplings. Exploitation of th

Study of molecular motions and 14N quadr
✍ Denis Ghesquière; Claude Chachaty 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 218 KB

## Abstract The internal and overall motions of 1,3‐ and 1,4‐diethylpyridinium bromides have been studied by ^13^C relaxation. The enthalpies of activation for the rotation of the ethyl groups in positions 1 and 3 are deduced from the temperature dependence of the __T__~1~ values of the methylene a

Determination of 3J(31P31P) and 13C31P c
✍ 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

Theoretical 13C chemical shift, 14N, and
✍ M. Tafazzoli; S. K. Amini 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 380 KB

## Abstract ^13^C chemical shieldings and ^14^N and ^2^H electric field gradient (EFG) tensors of L‐alanylglycine (L‐alagly) dipeptide were calculated at RHF/6–31 + + G\*\* and B3LYP/6–31 + + G\*\* levels of theory respectively. For these calculations a crystal structure of this dipeptide obtained