The ESR Study of the State of Ti(III) Ions in Supported Organotitanium Catalysts for Ethylene Polymerization Full article
Journal |
Journal of Molecular Catalysis (Continued after 1994 as Journal of Molecular Catalysis A: Chemical and Journal of Molecular Catalysis B: Enzymatic)
ISSN: 0304-5102 |
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Output data | Year: 1978, Volume: 4, Number: 3, Pages: 167-179 Pages count : 13 DOI: 10.1016/0304-5102(78)85012-3 | ||
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Abstract:
The state of Ti(III) ions in ethylene polymerization catalysts prepared by interaction of Ti(CH2C6H5)4 with SiO2 was studied by the ESR technique. Several types of Ti(III) ions, differing in ligand environment were observed. The relative amounts of Ti(III) ions of different types depend on the catalyst composition and the parameters of catalyst treatment. The formation of the Ti-H bond was found in samples heated under vacuum or treated with hydrogen. The nature of hyperfine splitting of hydrogen in the Ti(III)H bond was analyzed. The interaction of Ti(III) ions with H2 and C2H4 was studied. The adsorption of ethylene on titanium ions at low temperatures was followed by insertion of ethylene into the Ti-H and Ti-C bonds when the temperature was increased. By the ESR technique the hydrogenolysis of the Ti-C bond and its thermal decomposition by hydrogen transfer mechanism were followed under polymerization conditions.
Cite:
Maksimov N.G.
, Nesterov G.A.
, Zakharov V.A.
, Stchastnev P.V.
, Anufrienko V.F.
, Yermakov Y.I.
The ESR Study of the State of Ti(III) Ions in Supported Organotitanium Catalysts for Ethylene Polymerization
Journal of Molecular Catalysis (Continued after 1994 as Journal of Molecular Catalysis A: Chemical and Journal of Molecular Catalysis B: Enzymatic). 1978. V.4. N3. P.167-179. DOI: 10.1016/0304-5102(78)85012-3 WOS Scopus РИНЦ
The ESR Study of the State of Ti(III) Ions in Supported Organotitanium Catalysts for Ethylene Polymerization
Journal of Molecular Catalysis (Continued after 1994 as Journal of Molecular Catalysis A: Chemical and Journal of Molecular Catalysis B: Enzymatic). 1978. V.4. N3. P.167-179. DOI: 10.1016/0304-5102(78)85012-3 WOS Scopus РИНЦ
Dates:
Submitted: | Apr 20, 1977 |
Published print: | Jul 1, 1978 |
Published online: | Oct 2, 2001 |
Identifiers:
Web of science | WOS:A1978FD78200001 |
Scopus | 2-s2.0-49349123858 |
Elibrary | 30940593 |
Chemical Abstracts | 1978:490317 |
Chemical Abstracts (print) | 89:90317 |
OpenAlex | W1989800645 |