Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
PARA-FLUORO BENZYL SUBSTITUTED BIS(INDENYL) METALLOCENES AS CATALYST PRECURSORS IN ETHENE POLYMERIZATION
Autore:
JANY G; GUSTAFSSON M; REPO T; AITOLA E; DOBADO JA; KLINGA M; LESKELA M;
Indirizzi:
UNIV HELSINKI,INORGAN CHEM LAB,POB 55 FIN-00014 HELSINKI FINLAND
Titolo Testata:
Journal of organometallic chemistry
fascicolo: 1-2, volume: 553, anno: 1998,
pagine: 173 - 178
SICI:
0022-328X(1998)553:1-2<173:PBSBMA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ZIEGLER-NATTA CATALYSTS; PROPYLENE POLYMERIZATIONS; ELECTROSTATIC POTENTIALS; CONFORMATIONAL-ANALYSIS; OLEFIN POLYMERIZATION; SEMIEMPIRICAL METHODS; MOLECULAR-STRUCTURES; HAFNOCENE CATALYSTS; COMPLEXES; ZIRCONOCENE;
Keywords:
ZIRCONIUM; HAFNIUM; INDENYL; POLYMERIZATION; CATALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
G. Jany et al., "PARA-FLUORO BENZYL SUBSTITUTED BIS(INDENYL) METALLOCENES AS CATALYST PRECURSORS IN ETHENE POLYMERIZATION", Journal of organometallic chemistry, 553(1-2), 1998, pp. 173-178

Abstract

The unbridged complexes bis(eta(5)-(1-para-fluoro benzyl)indenyl) MCl2 (2: M = Hf; 3: M = Zr) as well as their ethylene bridged analogues bis[(eta(5)-3-(1-para-fluoro benzyl)indenyl)ethane] MCl2 (4: M = Hf; 5:M = Zr) have been synthesized and the obtained rac- and meso-isomers were separated from the 1:1 isomer mixtures. Complexation was performed by converting the ligand precursors (1-para-fluoro benzyl)indene (1a) and bis(3-(1-para-fluoro benzyl)indenyl)ethane (1b) into their lithio salts and further treatment with MCl4. To study the influence of thepara-fluoro benzyl substituent in ethene polymerization, the catalystprecursors 2-5 were activated with methylalumoxane (MAO) and their polymerization behavior was compared to corresponding unsubstituted metallocenes. The crystal structure of meso-like 3 was determined by meansof X-ray structure analysis, showing a central/lateral: gauche-type orientation of its para-fluoro benzyl substituents in the solid state. (C) 1998 Elsevier Science S.A.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 23:03:40