Patent ID: 8829156

Claim:
A complex represented by formula (4a): M is Co or Cr; X is each independently halogen; C 6 -C 20 aryloxy unsubstituted or substituted by nitro; or C 1 -C 20 carboxy unsubstituted or substituted by halogen; A is oxygen; Q is trans-1,2-cyclohexylene, ethylene or substituted ethylene; R 1 , R 2 , R 4 , R 6 , R 7 and R 9 are hydrogen; R 5 and R 10 are each independently hydrogen, tert-butyl, methyl or isopropyl; one or both of R 3 and R 8 are —[YR 41 3-m {(CR 42 R 43 ) n NR 44 R 45 R 46 } m ] X m or —[PR 51 R 52 ═N═PR 53 R 54 R 55 ] X, the other being hydrogen, methyl, isopropyl or tert-butyl; Y is C or Si; R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 51 , R 52 , R 53 , R 54 and R 55 are each independently hydrogen; C 1 -C 20 alkyl; C 1 -C 20 alkyl having one or more functional moieties selected from the group consisting of halogen, nitrogen, oxygen, silicon, sulfur and phosphorous; C 2 -C 20 alkenyl; C 2 -C 20 alkenyl having one or more functional moieties selected from the group consisting of halogen, nitrogen, oxygen, silicon, sulfur and phosphorous; C 7 -C 20 alkylaryl; C 7 -C 20 alkylaryl having one or more functional moieties selected from the group consisting of halogen, nitrogen, oxygen, silicon, sulfur and phosphorous; C 7 -C 20 arylalkyl; C 7 -C 20 arylalkyl having one or more functional moieties selected from the group consisting of halogen, nitrogen, oxygen, silicon, sulfur and phosphorous; or a metalloid radical of group XIV metal substituted by hydrocarbyl, two of R 44 , R 45 and R 46 , or two of R 51 , R 52 , R 53 , R 54 and R 55 being optionally fused together to form a bridged structure; m is an integer in the range of 1 to 3; and n is an integer in the range of 1 to 20.