group having 1 to 12 carbon atoms in which r 7 is ar as described above or an alkyl group having 1 to 12 carbon atoms preferably 1 to 4 carbon atoms and r 1 and r 2 are as described above q is an alkyl group having 1 to 12 carbon atoms z is an alkyl group a siloxane a polysiloxane a c 1 to c 4 alkoxy terminated siloxane or polysiloxane a polyether a polyester a polyurethane a poly butadiene or an aromatic polyaromatic or heteroaromatic group materials for preparation as the z group in these compounds are commercially available from a number of sources for example aromatic and polyaromatic materials may be obtained from basf or bayer siloxanes and polysiloxanes from gelest polyethers from basf polyesters from uniqema or bayer poly butadiene s from elf atochem polyurethanes from bayer or basf and alkanes from uniqema some of these sources will have available z materials already functionalized for reaction with a co reactive functionality on the vinyl ether or other electron donor starting material in other cases the practitioner will need to functionalize the materials in preparation for reaction with the electron donor containing starting material the z groups may contain cyclic moieties or heteroatoms and may contain pendant hydroxyl or thiol groups depending on the synthetic route for making the electron donor compound for example if one of the starting compounds contains a hydroxyl or thiol functionality that is reacted with an epoxy functionality the z group will contain a pendant hydroxyl or thiol group the exact composition or molecular weight of z is not critical to the invention and can range widely depending on the requirements of the end use for the hybrid electron donor compound the composition of z can be chosen to.