𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Simple Trends in NMR Spectra of Vinyl Polymers: The 1H NMR Spectrum of Poly(propylene)

✍ Scribed by Guglielmo Monaco; Adolfo Zambelli

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
118 KB
Volume
206
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Summary: The tacticity spreading of chemical shifts in the proton NMR spectrum of poly(propylene) in solution has been analyzed first qualitatively, taking advantage of known trends in both proton chemical shift and conformational statistics of vinyl polymers as summarized in the telephone rule, and then quantitatively using ab initio computations, empirical additivity schemes of proton chemical shifts, and conformational averages according to models of different rotational isomeric states. The very good results obtained, both qualitatively and quantitatively, stem from the relatively easy parametrization of proton chemical shift and establish a successful application of the telephone rule, also for proton NMR spectra.

Anti and syn labeling of methylene hydrogens in m and r diads.

magnified image__Anti__ and syn labeling of methylene hydrogens in m and r diads.

πŸ“œ SIMILAR VOLUMES

Simple Trends in the Methylene Regions o
Simple Trends in the Methylene Regions of the NMR Spectrum of Poly(propylene) and Ethylene-Propylene Copolymers
✍ Guglielmo Monaco; Irene Sessa; Adolfo Zambelli πŸ“‚ Article πŸ“… 2006 πŸ› John Wiley and Sons 🌐 English βš– 191 KB πŸ‘ 1 views

## Abstract **Summary:** The configurational sensitivity of the chemical shift of methylene carbons has been analyzed theoretically in terms of a perturbative approach. Theoretical results and computations have been applied successfully to new experimental data obtained from model compounds of the

Simple Trends in the Methylene and Ξ±-Sub
Simple Trends in the Methylene and Ξ±-Substituent Regions of NMR Spectra of Vinyl Polymers
✍ Guglielmo Monaco; Rosario G. Viglione πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 165 KB

## Abstract **Summary:** Chemical shift trends in the methylene and __Ξ±__ substituent regions of ^13^C NMR spectra of vinyl polymers have been analyzed in terms of a three‐state rotational isomeric states (RIS) model and the __Ξ³__‐__gauche__ effect. In this framework, it has been demonstrated that

Assignment of the 13C NMR spectrum of an
Assignment of the 13C NMR spectrum of anisomycin and the 1H and 13C NMR spectra of deacetylanisomycin
✍ J. W. LeFevre; S. E. Maier; W. Deng πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 260 KB

## Abstract The ^13^C NMR spectrum of anisomycin and the ^1^H and ^13^C NMR spectra of deacetylanisomycin were assigned using one‐ and two‐dimensional NMR analysis. The techniques included INEPT, ^1^Hο£Ώ^13^C HETCORR and ^1^H‐^1^H COSY spectroscopy.

Reassignment of the 1H NMR spectrum of f
Reassignment of the 1H NMR spectrum of fusidic acid and total assignment of 1H and 13C NMR spectra of some selected fusidane derivatives
✍ Niels Rastrup-Andersen; Tore Duvold πŸ“‚ Article πŸ“… 2002 πŸ› John Wiley and Sons 🌐 English βš– 80 KB

## Abstract Reassignment of the ^1^H and ^13^C NMR spectra of fusidic acid and the total assignment of lumifusidic acid and some important di‐ and tetra‐hydrofusidic acid derivatives are reported. Copyright Β© 2002 John Wiley & Sons, Ltd.