A novel catalyst precursor, (eta(5)-pentamethylcyclopentadienyl)titanium triallyloxide (Cp*Ti(OCH2-CH=CH2)(3)), was prepared and employed in a study of propylene polymerization in the presence of methylaluminoxane (MAO). This work has revealed that the half-titanocene catalyst is desirable for the production of elastomeric poly(propylene) with high molecular weight ((M) over bar(w) = 8-69 x 10(4)) as well as in good yields under typical polymerization conditions.