Dendrimer-based phosphines with 8, 24 and 72 PR2 arms (R = Me, Et. hexyl, C
y or Ph) based on polyhedral oligomeric silsesquioxane (POSS) cores have be
en synthesized and shown to catalyse hydroformylation reactions, in some ca
ses with higher linear:branched product ratio (1:b) than their monomeric an
alogues. (C) 2000 Elsevier Science S.A. All rights reserved.