𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C and 15N NMR Study of Electron Distribution in N-Aryl-N′-cyanoguanidines

✍ Scribed by Ian D. Cunningham; Nan Chi Wan

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
512 KB
Volume
34
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

13C and "N NMR spectroscopic assignments are given for a series of N-aryl-N-cyanoguanidines in DMSO-d, along with those for a few related cyanoguanidines. The NMR data are interpreted in terms of minimal overlap of the amino lone pair with the attached aryl ring, and a planar guanidine structure with the three nitrogen and one carbon pz orbitals forming a delocalized a-orbital analogous to the guanidinium ion structure; the N-aryl and the N-cyano groups act as a-inductive substituents to the system.

📜 SIMILAR VOLUMES

13C and 15N NMR study of derivatives of
13C and 15N NMR study of derivatives of N-unsubstituted pyrrolidines
✍ Didier Barbry; Bruno Hasiak; Daniel Couturier 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 192 KB

## Abstract ^13^C and ^15^N NMR data for twelve __N__‐unsubstituted pyrrolidines are reported and __cis__ and __trans__ stereomers are assigned for 2,3‐, 2,4‐ and 2,5‐disubstituted compounds.

1H, 13C and 15N NMR study of N1-alkyl-N2
1H, 13C and 15N NMR study of N1-alkyl-N2-arylthioureas
✍ Iwona Wawer; Vera Koleva 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 407 KB

## Abstract ^13^C and ^15^N NMR chemical shifts were measured for __N__^1^‐alkyl‐__N__^2^‐arylthioureas. The absence of decoalescence of the __N__^1^‐alkyl group carbon signals down to 190 K, the europium‐induced chemical shifts and the molecular mechanics calculations indicate that the preferred c

17O, 15N and 13C NMR chemical shifts of
17O, 15N and 13C NMR chemical shifts of N,N-dimethylmethanesulphinamide in various solvents
✍ A.-M. Häkkinen; P. Ruostesuo; S. Kurkisuo 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 330 KB

The 170, 15N and =C NMR chemical shifts have been determined for N,N-dimethylmethanesulphinamide (l), both as the neat liquid and in dimethyl sulphoxide, acetone, chloroform and various alcohols. The 0 and 15N nuclei of 1 resonate at a lower frequency than those of the corresponding sulphonamide, an

15N and 13C n.m.r. study of azimines and
15N and 13C n.m.r. study of azimines and azoxybenzenes
✍ W. Schwotzer; Ch. Leuenberger; L. Hoesch; A. S. Dreiding; W. von Philipsborn 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 195 KB

## Abstract ^15^N chemical shifts, ^1^__J__(NN), ^1^__J__(NC) and ^2^__J__(NC) coupling constants have been used to prove the open chain structure and configuration of __cis__‐ and __trans__‐2,3‐diphenyl‐1‐phthalimidoazimines. For comparison, the corresponding data of the iso‐π‐electronic __cis__‐

NMR studies in the heterocyclic series X
NMR studies in the heterocyclic series XXIV—1H, 13C and 15N study of 15N labelled indazoles
✍ Alain Fruchier; Valdo Pellegrin; Rémy Schimpf; José Elguero 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 352 KB

## Abstract The ^15^N chemical shifts and ^1^H^15^N and ^13^C^15^N coupling constants of nine monolabelled indazoles were measured and assigned. The experimental values are discussed in terms of the indazolic and iso‐indazolic structures, and compared with literature data for other related hetero

13C and 15N NMR study of substituted 1,2
13C and 15N NMR study of substituted 1,2,4-triazines
✍ Erkki Kolehmainen; David Šaman; Alois Pískala; Milena Masojídková 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 315 KB

## Abstract ^13^C and ^15^N NMR spectra of eight substituted 1,2,4‐triazines were measured and assigned. The assignments of the ^13^C NMR spectra were based on the substituent chemical shifts and ^__n__^__J__(C,H) coupling constants. ^15^N NMR chemical shifts generally showing well separated ranges