Application of carbon arc-generated Mo- and W-based catalyst systems to the ROMP of norbornene

Autor:	Fatma Sevin, Abdulilah Ece, Bülent Düz, Can Koray Elbistan
Rok vydání:	2009
Předmět:	Thermogravimetric analysis chemistry.chemical_element General Chemistry ROMP Tungsten Metathesis Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Polymerization Molybdenum Polymer chemistry Norbornene
Zdroj:	Applied Organometallic Chemistry. 23:359-364
ISSN:	1099-0739 0268-2605
DOI:	10.1002/aoc.1518
Popis:	This study focuses on the application of the carbon arc-generated molybdenum-and tungsten-based catalyst systems, MoCl5-C and WCl6-C, to effect ring-opening metathesis polymerization (ROMP) of bicyclo[2.2.1]hept-2-ene (norbornene). The results are compared with those previously obtained by the electrochemically generated MoCl5-(e) over bar -Al-CH2Cl2 and WCl6-(e) over bar -Al-CH2Cl2 systems. The polymer products are characterized using H-1 and C-13 NMR, gel permeation chromatography, differential scanning calorimetry and thermo gravimetric analysis. According to NMR spectra analyses, the molybdenum-based catalyst system produced polynorbornene with ca 48% cis structure whereas tungsten system produced ca 56% cis structure polynorbornene and in both cases the polynorbornene had a blocky distribution. Copyright (C) 2009 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0348db09f94487484b8f04485324aa02 https://doi.org/10.1002/aoc.1518 Zobrazit plný text záznamu Plný text