𝔖 Bobbio Scriptorium
✦   LIBER   ✦

An NMR study of 2-alkoxy-1,3,2-dioxaphospholanes. I—13C chemical shifts

✍ Scribed by D. Besserre; S. Coffi-Nketsia

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
410 KB
Volume
13
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Measurements of the ^13^C chemical shifts of 2‐alkoxy‐1,3,2‐dioxaphospholanes have allowed the determination of the contribution of the substituent to the α‐, β‐ and γ‐carbon chemical shifts of attached alkyl groups. The preliminary assignments of the signals were made using the following information; relative intensities, variations in coupling constants J(^31^P^13^C) and the existence of linear correlations between the shifts of carbon atoms in the P‐alkoxy groups and the degree of substitution of the observed carbon or of its neighbours.

📜 SIMILAR VOLUMES

Substituent-induced chemical shift 13C N
Substituent-induced chemical shift 13C NMR study of substituted 2-phenylthiazolidines
✍ R. Umarani 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB

## Abstract The analysis of the ^13^C NMR chemical shifts of 16 substituted 2‐phenylthiazolidines shows that the 1,3‐thiazolid‐2‐yl group exerts a deshielding effect at the __ipso__ carbon (C‐1′) and shielding effects at the __ortho__ and __para__ positions of the benzene ring (C‐2′ and C‐4′), and

13C NMR chemical shift assignments for s
13C NMR chemical shift assignments for some 2-substituted cyclic 1,3-diketones
✍ Michael P. Sammes; Prem Nath Maini 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 154 KB

Complete 13C NMR chemical shift assignments are reported for 32 cyclic and one acyclic 1.3-diketones, either unsubstituted or having one or two substituents at the 2-position. The first two classes exist exclusively in the enol form in (CD,),SO and as mixed tautomers in CDCI,.

13C NMR chemical shift assignments for s
13C NMR chemical shift assignments for substituted 2-azabicyclo[3.3.1] nonan-7-ones
✍ Núria Casamitjana; Josep Bonjoch; Jordi Gràcia; Joan Bosch 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB

## Abstract The ^13^C NMR spectra of 26 substituted 2‐azabicyclo[3.3.1]nonan‐7‐ones are reported, providing a diagnostic method for the stereochemical elucidation of the relative configuration of these products.

13C NMR chemical shifts of 2,4,5,- tri-s
13C NMR chemical shifts of 2,4,5,- tri-substituted 2H-pyridazin-3-ones
✍ T. Liptaj; V. Konečny; Š Kovác 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 155 KB

## Abstract The ^13^C NMR spectra of a series of 2‐X‐4‐Y‐5‐Z‐substituted 2H‐pyridazin‐3‐ones were measured and assigned on the basis of results from one‐dimensional semi‐selective INEPT or one‐dimensional relayed coherence transfer (HICUUP) experiments.