| 摘要 |
<p>The present invention relates to a compound having the formula (I): LnAmMXk, wherein L is a boratabenzene ligand of formula (II), wherein the radicals R are identical or different and are each a hydrogen atom, a C1-C10-group, A is a π-ligand such as cyclopentadienyl, M is a metal of group 3 or 5 of the Periodic System of the Elements and X is a hydrogen atom, a C1-C40-group, an OH group, a halogen atom or NR22, n is 1 or 2, m is 0 or 1 and k is an integer from 1 to 4, where the sum of n+m+k is from 3 to 5. The present invention also relates to a process for preparing the transition metal compound and to its use as a catalyst component during the preparation of polyolefins.</p> |
