na Silva

Mobile Phase Effects in Rh/Sulfonated Phosphine/Molten Salts Catalysed the Biphasic Hydroformylation of Heavy Olefins

Rh(acetylacetonate)(CO)2/sulfonated-Xantphos dissolved in pure 1-n-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyses the hydroformylation of heavy olefins (C8–C12) with selectivities (up to 99% in n-aldehydes). The selectivity is strongly influenced by the nature of the ionic phase and co-solvent.

A novel dicationic phenoxaphosphino-modified Xantphos-type ligand???a unique ligand specifically designed for a high activity, selectivity and recyclabilityElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b2/b209486j/

A novel phenoxaphosphino-modified ligand has been prepared and successfully employed in the rhodium catalysed hydroformylation of 1-octene in ionic liquids showing unprecedented high selectivity and activity without detectable rhodium or phosphorus leaching during recycling experiments.

Hydrogenation of styrene-butadiene rubber by hydrogen transfer from limonene

The heterogeneous catalytic transfer hydrogenation of styrenebutadiene rubber (SBR) by the use of limonene as hydrogen source and as solvent in the presence of Pd/C as catalyst has been studied. The influence of the heating time on the reduction and on the structure of the donor was studied. Partial hydrogenations of the olefinic bonds of SBR are obtained when a mixture of limonene, SBR and 10% Pd/C is refluxed with vigorous stirring for 50–200 minutes.