title: Diphenylphosphine containing macromolecules in the methoxycarbonylation of ethene: the effect of macromolecular architecture on the selectivity of the reaction.
abstract: Various polyhedral oligomeric silsesquioxanes containing diphenylphosphine moieties at their periphery have been used in the methoxycarbonylation of ethene. Those with a -CH(2)CH(2)- spacer between the silicon and the phosphorus atoms (G0-8ethylPPh(2) and G1-16ethylPPh(2)) only produce methyl propanoate whilst a similar macromolecule with a -CH(2)- spacer between Si and P (G1-16methylPPh(2)) gives only copolymer. The effect of the molecular architecture is discussed in comparison with the selectivities observed when using small molecule analogues.
authors.affiliation: School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST.
authors.forename: Nicolas R
authors.initials: NR
authors.lastname: Vautravers
authors.forename: David J
authors.initials: DJ
authors.lastname: Cole-Hamilton