ISSN:
0268-2605
Keywords:
Olefin
;
oligomerization
;
isomerization
;
catalysis
;
poisons
;
carbon monoxide
;
NMR spectra
;
infrared spectra
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The interaction of the olefin oligomerization catalyst system derived from [Ni(sacsac)(PBu3)Cl] (sacsac = pentane-2,4-dithionate = dithioacetylacetonate) with carbon monoxide (CO) has been examined by a combination of 31P NMR and FTIR spectroscopy. The catalyst is rapidly and completely inhibited by CO; however, removal of the CO restores catalytic activity. A CO-adduct of the active catalyst has a characteristic CO stretching frequency of 2042 cm-1, and δ31P 9.9 ppm. Carbon monoxide does not react with [Ni(sacsac)(PBu3)Cl], but [Ni(sacsac)(PBu3)(Cl)] reacts with any of Et2AlCl, BuLi, Li[Et3BH] or K[(s-Bu)3BH] under an atmosphere of carbon monoxide in the presence or absence of olefin to produce [Ni(PBu3)(CO)3], which has been identified by FTIR and 31P NMR. [Ni(sacsac)(PBu3)Cl] reacts completely with BuLi or K[(s-Bu)3BH] to form catalytically inactive species which yield active catalysts on addition of Et2AlCl.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aoc.590040512
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