Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 4, Issue 11, Pages 1798-1805Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7qi00227k
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Funding
- NSF [1362999, CHE-1048804]
- Direct For Mathematical & Physical Scien [1362999] Funding Source: National Science Foundation
- Division Of Chemistry [1362999] Funding Source: National Science Foundation
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The synthesis and characterization of (thiolfan*)Zr(O'tBu)(2) (thiolfan* = 1,1'-di(2,4-di-tert-butyl-6-thiophenoxide) ferrocene) is reported, as well as its activity toward the ring-opening polymerizations of L-lactide and epsilon-caprolactone. With the titanium analogue, (thiolfan*)Ti((OPr)-Pr-i)(2), diblock copolymers (AB and BA) and a triblock copolymer (ABA) were synthesized in a one-pot, redox-controlled process. Changing the metal center from titanium to zirconium has a profound influence on the reactivity profile of the corresponding reduced and oxidized catalysts in the switchable ring opening polymerization of cyclic esters and ethers.
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