𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The assignment of signals in the nitrogen NMR spectra of polycyclic diazines

✍ Scribed by M. Witanowski; L. Stefaniak; G. A. Webb


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
237 KB
Volume
16
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

^15^N Nitrogen screening data are reported for some polycyclic azines and compared with previous results where available. INDO/S parameterized screening calculations for cinnoline and quinazoline help to decide between alternative nitrogen assignments. Nitrogen solvent shifts of several ppm are reported for all of the molecules studied.


📜 SIMILAR VOLUMES


Reinvestigation of the structural assign
✍ Piet Van Loo; André De Bruyn; Miloš Buděšínský 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 439 KB 👁 1 views

The assignment of some 'H and -C NMR chemical shifts of apigenin have been uncertain and even contradictory. A reinvestigation with recent NMR techniques has led to a new set of =C NMR parameters and confinned the accepted 'H NMR data.

Detection and assignment of the glucose
✍ Rolf Gruetter; Douglas L. Rothman; Edward J. Novotny; Gerald I. Shulman; James W 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 375 KB

## Abstract The difference between ^1^H NMR spectra obtained during eu‐ and hyperglycemia exhibited well‐resolved glucose peaks between 3 and 4 ppm as demonstrated by comparison with solution spectra. Estimated increases were consistent with recent ^13^C NMR quantitations of intracerebral glucose.

Assignment of the 1H and 13C NMR signals
✍ Elías Quezada; Lourdes Santana; Eugenio Uriarte 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 86 KB 👁 1 views

## Abstract The complete ^1^H and ^13^C NMR assignment of four **6**,**7**‐benzo‐fused furocoumarins (**1**–**4**) and three 3,4‐benzo‐fused furocoumarins (**5**–**7**) has been performed using 1D and 2D NMR techniques, including COSY, HMQC and HMBC experiments. Copyright © 2006 John Wiley & Sons,

Assignment of the 1H and 13C NMR signals
✍ Elías Quezada; Santiago Vilar; Dolores Viña; Lourdes Santana; Eugenio Uriarte 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 92 KB

## Abstract The complete ^1^H and ^13^C NMR assignments of six hydroxyphenylcoumarins have been made using 1D and 2D NMR techniques, including COSY, HMQC and HMBC experiments. Copyright © 2007 John Wiley & Sons, Ltd.

13C NMR spectra of a series of 2′,3′,4′-
✍ J.-C. Wallet; E. M. Gaydou 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 165 KB 👁 1 views

## Abstract ^13^C NMR chemical shifts of a series of 2′,3′,4′‐trimethoxylated flavones are reported. The ^13^C NMR chemical shifts of 2′,3′, 4′‐trimethoxyflavone was reinvestigated by 2D NMR. It is shown that two signals which were assigned by the lanthanide shift reagent method in an earlier study