| 摘要 |
<p>Novel compounds of the structure <CHEM> wherein R<1> and R<2> are each an alkoxy group which may be the same or different and have from one to ten carbon atoms, and R<3>-R<6> are each individually, hydrogen, a hydrocarbyl group, a hydrocarboxyl group, a nitro group, a silyl group or a halogen, with the provisos that (1) if either R<1> and R<2> are methoxy, then at least one of R<3>-R<6> is not hydrogen, (2) if R<1> and R<2> are both ethoxy, then at least one of R<3>-R<6> is not hydrogen, and (3) R<1> and R<2> cannot both be methoxy. These electron donor compounds are used in the manufacture of olefin polymerization catalysts.</p> |
