| 摘要 |
Polysubstituted cyclopentadiene compound which comprises at least one substituent of the form -(ER2)pD(R')nH, where E is an atom chosen from group (14) of the Periodic System of the Elements, D is a hetero atom chosen from group (15 or 16) of the Periodic System of the Elements, R and R' are substituents, n is the number of R' groups bonded to D and p = 1-4, characterized in that at least one other substituent is a branched alkyl group with at least 3 carbon atoms, 1 t-butyl group being excluded as sole other substituent. |
