Patent ID: 8501885

Claim:
A chain shuttling agent having the formula: R 1 [M A -R 2 —] N M A R 1 , R 1 [M B R 1 —R 2 —] N M B (R 1 ) 2 , M C [R 2 ] 2 M C , or M B [R 2 ] 3 M B ; or an aggregate thereof, a Lewis base-containing derivative thereof, or any combination thereof; wherein M A is Zn or Mg; M B is B, or Ga; M C is Mg; R 1 in each occurrence is independently selected from hydrogen, halide, amide, hydrocarbyl, hydrocarbylamide, dihydrocarbylamide, hydrocarbyloxide, hydrocarbylsulfide, dihydrocarbylphosphido, tri(hydrocarbyl)silyl; any hydrocarbyl group being optionally substituted with at least one halide, amide, hydrocarbylamide, dihydrocarbylamide, or hydrocarbyloxide; and each carbon-containing R 1 having from 1 to 20 carbon atoms, inclusive; R 2 in each occurrence is independently selected from (CH 2 ) m , O[(CH 2 ) n CH 2 CH 2 ] 2 , S[(CH 2 ) n CH 2 CH 2 ] 2 , R A N[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 2 Si[(CH 2 ) n CH 2 CH 2 ] 2 , (R B ) 3 SiOSiR B [(CH 2 ) n CH 2 CH 2 ] 2 , or [Si(R B ) 2 (CH 2 ) n CH 2 CH 2 ] 2 O; wherein n in each occurrence is independently an integer from 1 to 20, inclusive; m is an integer from 2 to 20, inclusive; R A is H or a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and R B in each occurrence is independently a hydrocarbyl having from 1 to 12 carbon atoms, inclusive; and N, on average, in each occurrence is a number from 2 to 150, inclusive.