A Well-Defined Ni(II) α‑Diimine Catalyst
Supported on Sulfated Zirconia for Polymerization Catalysis
Posted on 2017-06-22 - 17:06
The reaction of (α-diimine)NiMe2 (α-diimine
= (2,6-iPr2-C6H3)NCMeMeCN(2,6-iPr2-C6H3)) with partially
dehydroxylated sulfated zirconia (SZO300) in MeCN results in the formation of [(α-diimine)NiMe(NCMe)][SZO300] ([1][SZO300]) and methane. Reactions in Et2O resulted in mixtures of [(α-diimine)NiMe(OEt2)][SZO300] ([2][SZO300]) and [(α-diimine)NiMe(OEt2)][MeSZO300] ([2][MeSZO300]), which
were characterized by solid-state NMR spectroscopy. Contacting these
solids with ethylene and monitoring the reaction by solid-state NMR
showed that Ni–Me sites insert ethylene. [1][SZO300] and [2][SZO300]/[2][MeSZO300] are active ethylene polymerization catalysts
and show properties similar to those of closely related homogeneous
catalysts. [2][SZO300]/[2][MeSZO300]
copolymerizes ethylene and methyl 10-undecenoate to form copolymers
with up to 0.4% incorporation of the polar monomer.
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Tafazolian, Hosein; Culver, Damien B.; Conley, Matthew P. (2017). A Well-Defined Ni(II) α‑Diimine Catalyst
Supported on Sulfated Zirconia for Polymerization Catalysis. ACS Publications. Collection. https://doi.org/10.1021/acs.organomet.7b00402
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AUTHORS (3)
HT
Hosein Tafazolian
DC
Damien B. Culver
MC
Matthew P. Conley