| abstract |
A compound represented by the formula: n nwhere:n M is a transition metal selected from group 4 of the periodic table; each R 1 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and functional group, and any two R 1 groups may be linked, provided that if the two R 1 groups are linked, then they do not form a butadiene group when M is Zr; R 3 is carbon or silicon; R 4 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; R 5 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, R 4 and R 5 may be bound together to form a ring; R 6 is carbon or silicon; each R 7 is hydrogen; each R 8 is independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, pentyl, hexyl and the isomers thereof; R 10 is -M 2 (R 16 ) h — where M 2 is B, Al, N, P, Si or Ge, h is 1 or 2; each R 9 , R 11 , R 13 and R 14 and R 16 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and two R 16 groups may be linked together to form a ring; each R 12 and R 15 is carbon or silicon; and a, b, c, d, e, f, and g are independently 0, 1, or 2. |