Polyketones (M w = 56 000-87 000 g mol 21 ) with very narrow molecular weight distributions have been obtained by CO/tertbutylstyrene copolymerisation in supercritical carbon dioxide using palladium complexes with perfluorinated bipyridine and phenanthroline ligands.
High selectivity in acids is obtained in the first example of hydrocarboxylation of 1-octene in supercritical carbon dioxide using a Pd/P(4-C6H4-CF3)3 catalyst system and a perfluorinated surfactant.
2006 Carboxylic acids P 0250 Hydrocarboxylation of Terminal Alkenes in Supercritical Carbon Dioxide Using Perfluorinated Surfactants. -The use of scCO2 in the title reaction increases the selectivity compared to the organic and aqueous system. The addition of a perfluorinated surfactant enhances the activity and the regioselectivity to the linear acid (III) although the selectivity decreases. -(TORTOSA-ESTORACH, C.; RUIZ, N.; MASDEU-BULTO*, A. M.; Chem. Commun. (Cambridge) 2006, 26, 2789-2791; Dep. Quim. Fis. Inorg., Univ. Rovira Virgili, E-43007 Tarragona, Spain; Eng.) -M. Paetzel 46-076
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