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Citation: Luo He-Kuan, Li Da-Gang. High Pressure in situ IR Studies on Mechanism of Palladium(II) Catalyzed Copolymerization of CO with Ethylene[J]. Acta Physico-Chimica Sinica, ;1997, 13(02): 158-163. doi: 10.3866/PKU.WHXB19970211 shu

High Pressure in situ IR Studies on Mechanism of Palladium(II) Catalyzed Copolymerization of CO with Ethylene

Luo He-Kuan ,
Li Da-Gang

1.
Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000

Received Date: 27 May 1996
Available Online: 15 February 1997

The copolymerization of CO with ethylene was studied with high pressure in situ IR technique using (DPPPr)Pd(p-CH3PhSO3)2 as the catalyst precursor. Two IR absorptions of carbonyl groups were observed at 1900cm-1 and 1810cm-1 under pure CO ambience, which proved that CO was coordinated with Pd(Ⅱ) under pure CO ambience. Three IR absorptions were observed at 1638, 1616, 1970cm -1 under real reaction conditions, which could be assigned to three intermediates (1,2,3) respectively, indicating that the insertion of CO into Pd-OR bond was probabaly one of the main initation path ways in alcohol solvent.
- Carbon monoxide,
- Ethylene,
- Copolymerization,
- In situ IR
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