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Diastereomere Alkene als Modelle für die 13C-NMR-Spektroskopie von Polymeren

✍ Scribed by Ritter, Wolfgang ;Elgert, Karl-Friedrich

Publisher
Wiley (John Wiley & Sons)
Year
1977
Weight
626 KB
Volume
178
Category
Article
ISSN
0025-116X

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✦ Synopsis

Abstract

Trans‐3,4,7,8‐tetramethyl‐5‐decene is a low molecular weight model of poly‐2,5‐(2,4‐hexadiene). Eight resonance signals can be observed in the ^13^C NMR spectrum of the carbon double bond which are assigned to the relative configurations of the asymmetric carbon atoms. The configurational splitting can be described partially by additive constitutional and configurational shift parameters, which have been determined from a number of alkenes with up to four asymmetric carbon atoms. However, full additivity is not reached as the conformation of the substituents of the carbon double bond influences the shift differences due to the relative configurations of the asymmetric carbon atoms.

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Diastereomere Alkane als Modelle für die
Diastereomere Alkane als Modelle für die 13C-NMR-Spektroskopie von Polymeren
✍ Elgert, Karl-Friedrich ;Ritter, Wolfgang 📂 Article 📅 1977 🏛 Wiley (John Wiley & Sons) ⚖ 379 KB

## Abstract Low molecular weight alkanes, e.g. 3,7‐dimethylnonane, with two asymmetric carbon atoms are suitable models for the assignment of the configurational splitting in the ^13^C NMR spectrum of the alternating copolymer from ethylene and propylene, poly(1‐methyltetramethylene).