𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the Crystal Structure of cis-1,4-Poly(2,3-dimethyl-1,3-butadiene)

✍ Scribed by Beniamino Pirozzi; Roberto Napolitano; Vittorio Petraccone; Simona Esposito

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
149 KB
Volume
24
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Models for the crystal structure of cis‐1,4‐poly(2,3‐dimethyl‐1,3‐butadiene) are elucidated by the joint use of molecular mechanics and WAXS. The chain conformation can be predicted by using different sets of potential functions. A model of crystal structure calculated by molecular mechanics has been refined in order to find the best accordance with the experimental X‐ray powder spectra. Another model is proposed to explain a few minor discrepancies between the calculated and the experimental WAXS powder spectra.

Portion of the chain of cis‐PDMBD, containing two monomer units with indications of the symmetry elements of the tci line repetition group, and of the bond and torsion angles of the backbone, which are independent variables.

magnified imagePortion of the chain of cis‐PDMBD, containing two monomer units with indications of the symmetry elements of the tci line repetition group, and of the bond and torsion angles of the backbone, which are independent variables.

📜 SIMILAR VOLUMES

On the Crystal Structure of Isotactic ci
On the Crystal Structure of Isotactic cis-1,4-Poly(1,3-pentadiene)
✍ Roberto Napolitano 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 173 KB

## Abstract **Summary:** A comparison between the crystal structure of isotactic __cis__‐1,4‐poly(1,3‐pentadiene) previously predicted by molecular mechanics calculations and that successively determined by other authors by experimental data is reported. The agreement between the two structures is

Crystal and molecular structure of diast
Crystal and molecular structure of diastereomeric 2-diphenylthiophosphinoyl-cis-(4,6-dimethyl)-1,3-dithianes
✍ Michał W. Wieczorek; Grzegorz D. Bujacz; Wiesław R. Majzner; Piotr P. Graczyk; M 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 262 KB 👁 2 views

The crystal and molecular structures of a pair of diastereomeric 2-diphenylthiophosphinoylcis-(4,6-dimethyl)-1,3-dithianes 2 have been determined by the X-ray method. The differences in corresponding bond distances in cis-2 and trans-2 are discussed in context of the anomeric effect operating in thi

Zur strukturbestimmung des 1,4-poly(2,3-
Zur strukturbestimmung des 1,4-poly(2,3-dimethyl-1,3-butadien)s durch 13C NMR-spektroskopie
✍ Ritter, Wolfgang ;Elgert, Karl-Friedrich ;Cantow, Hans-Joachim 📂 Article 📅 1977 🏛 Wiley (John Wiley & Sons) ⚖ 223 KB

## Abstract __cis__ and __trans__ Configuration of monomeric units in 1,4‐poly(2,3‐dimethyl‐1,3‐butadiene), poly(1,2‐dimethyl‐1‐butenylene), has been determined by ^13^C NMR spectroscopy.