Abstract
Homo-dinuclear Co and Zn complexes derived from the macrocycle LH2, {[2-(OH)-5-(R)-C6H2-1,3-(CH)2][CH2CH2(2-C6H4N)2]}2 (R = Me, tBu), revealed near inactivity for the ring opening polymerization (ROP) of the cyclic esters δ-valerolactone (δ-VL) and ε-caprolactone (ε-CL). By contrast, the hetero-bimetallic complexes [LCo(NCMe)(μ-Br)ZnBr]·nMeCN (n = 3 or 3.25) were found to be efficient catalysts for the ROP of ε-CL and δ-VL.
Highlights
The production of aliphatic polyesters has become a very topical area given their biodegradability and biocompatibility,[1] and given the current global issues with plastic pollution, this is likely to remain the case for the foreseeable future.[2]
Homo-dinuclear Co and Zn complexes derived from the macrocycle LH2, {[2-(OH)-5-(R)-C6H2-1,3-(CH)2][CH2CH2(2-C6H4N)2]}2 (R = Me, tBu), revealed near inactivity for the ring opening polymerization (ROP) of the cyclic esters d-valerolactone (d-VL) and e-caprolactone (e-CL)
One viable route to such polymers is via the metal-catalyzed ring opening polymerization (ROP) of cyclic esters.[3]
Summary
The production of aliphatic polyesters has become a very topical area given their biodegradability and biocompatibility,[1] and given the current global issues with plastic pollution, this is likely to remain the case for the foreseeable future.[2]. Homo-dinuclear Co and Zn complexes derived from the macrocycle LH2, {[2-(OH)-5-(R)-C6H2-1,3-(CH)2][CH2CH2(2-C6H4N)2]}2 (R = Me, tBu), revealed near inactivity for the ring opening polymerization (ROP) of the cyclic esters d-valerolactone (d-VL) and e-caprolactone (e-CL).
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