Tailored cationic palladium(II) compounds as catalysts for highly selective linear dimerization of styrene and linear polymerization of p-divinylbenzene
- Pennsylvania State Univ., Univ. Park (United States)
An important advantage in using transition-metal compounds as catalysts is the ability to tailor their activity and selectivity by a rational choice of ligands. The authors had earlier reported that the palladium(II) species (Pd(MeCN){sub 4})(BF{sub 4}){sub 2} (1) was an active catalyst for the polymerization of styrene (typical MW: 70,000) and the di- and trimerization of {alpha}-methylstyrene to the corresponding indan derivatives at room temperature. The usual cationic mechanism was invoked for these transformations. Herein, they report that the replacement of the weakly coordinating MeCN ligands in 1 by more strongly ligating and bulkier pyridine and phosphine derivatives results in the formation of highly selective catalysts for selective linear dimerization of styrene and linear polymerization of p-divinylbenzene. The new catalyst systems differ from most existing systems for the cationic oligomerization and polymerization of styrene derivatives in several important ways.
- DOE Contract Number:
- FG02-84ER13295
- OSTI ID:
- 5543380
- Journal Information:
- Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 112:26; ISSN 0002-7863; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKYLATED AROMATICS
AROMATICS
AZINES
CATALYSTS
CATALYTIC EFFECTS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
COMPLEXES
DIMERIZATION
DIVINYLBENZENE
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IONS
LIGANDS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PALLADIUM
PALLADIUM COMPLEXES
PHOSPHINES
PHOSPHORUS COMPOUNDS
PLATINUM METALS
POLYMERIZATION
PYRIDINES
STYRENE
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS