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http://nopr.niscpr.res.in/handle/123456789/30914| Title: | Hydroformylation of olefins catalyzed by transient montomorillonite rhodium (II) catalyst |
| Authors: | Halligudi, S B |
| Issue Date: | May-1997 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Transient [RhIIH(CO)(PPh3)2]- 2 complex obtained by the reaction of synthesis gas with montmorillonite loaded complex [Rh(PPh3)3]+ 1 catalyzes the hydroformylation of allyl alcohol at 70°C and 60atm CO + H2 (1:1) in alcoholic solvents to give > 96% yield of the linear product (L) 4-hydroxybutyraldehyde with branched (B)/linear product mole ratio 0.04. The activity of 2 is greatly influenced by the alcoholic solvents used in the hydroformylation reaction; the longer the carbon chain higher the activity of the catalyst with the loss of selectivity (B/L ratio 0.08-0.14). The activity is compared with the Wilkinson catalyst [Rh1H(CO)(PPh3)2] 6 in homogeneous conditions. Complex 6 is found to be five times more reactive than 2 but with a loss of selectivity in the hydroformylation of allyl alcohol which gives 4-hydroxybutyraldehyde (65%) (B/L ratio 0.54) in ethanol. Similar observations have been found in the hydroformylation reactions of styrene, 4-chlorostyrene, cyciohexene and 1,3-butadiene to give corresponding products. |
| Page(s): | 150-154 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Appears in Collections: | IJCT Vol.04(3) [May 1997] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCT 4(3) 150-154.pdf | 375.93 kB | Adobe PDF | View/Open |
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