[2,6-di(propan-2-yl)phenyl]imino-hydridotantalum;(6-methanidyl-2,4-dimethylcyclohexa-1,3-dien-1-yl)-(2,4,6-trimethylcyclohexyl)silane;1,2,3,4,5-pentamethylcyclopenta-1,3-diene