CYCLOCARBONYLATION OF ALLYL ALCOHOL USING COBALT PHOSPHINE CATALYST
γ-Butyrolactone (GBL) is an ester cyclic compound with four carbons commonly used as intermediate substances for pyrrolidone or N-vinylpyrrolidone synthesis. GBL was synthesized from allyl alcohol and a mixture of hydrogen and carbon monoxide initiated by [Co2(CO)6(PPh3)2] and [Co2(CO)6(P(O...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/22720 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | γ-Butyrolactone (GBL) is an ester cyclic compound with four carbons commonly used as intermediate substances for pyrrolidone or N-vinylpyrrolidone synthesis. GBL was synthesized from allyl alcohol and a mixture of hydrogen and carbon monoxide initiated by [Co2(CO)6(PPh3)2] and [Co2(CO)6(P(OPh)3)2]. Dimer cobalt complexes were synthesized from cobalt(II) salts using carbon monoxide gas (35 bar) in THF, for 24 hours. The product showed an infrared absorbance of terminal carbonyl (νCO) at 1942 cm-1 for [Co2(CO)6(PPh3)2] and νCO at 2009 cm-1 for [Co2(CO)6(P(OPh3)2]. The complex of [Co2(CO)6(PPh3)2] was used in the carbonylation reaction test for allyl alcohol at 140 oC for 48 hours with pressure of hydrogen and carbon monoxide of 8 and 12 bars respectively. The product of reaction shows an infrared absorbance of carbonyl at 1743 cm-1 predicted as an absorbance of carbonyl ester of GBL. The catalytic test using [Co2(CO)6(P(OPh3)2] in the same condition resulted in no γ-butyrolactone formation. |
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