Abstract
Sodium 2-arylimino-8-quinolates have been shown to adopt a variety of unusual multimetallic assemblies; all exhibit good activities towards the ROP of rac-lactide.
Highlights
Biodegradable polylactide (PLA) has been the focus of much attention in recent years due to its numerous applications in packaging, agricultural materials, drug delivery, medical devices, and so on.[1]
Compound L8 has not been reported before and full details for its synthesis are given in the experimental section
The crystal structures of C1 – C5 and C7' reveal a diversity of structural types with C1, C2 and C4 adopting tetrametallic cubic cores, C3 and C5 hexametallic hexagonal prismatic cores and C7', a decomposition product of C7, a tetrametallic structure with a core best described as a cyclooctatetraene-type tub-shape
Summary
Biodegradable polylactide (PLA) has been the focus of much attention in recent years due to its numerous applications in packaging, agricultural materials, drug delivery, medical devices, and so on.[1]. Journal Name counterparts displayed high activities towards ethylene polymerization.14c-e To further explore the use of 2aryliminoquinolin-8-ols, we disclose a series of sodium 2arylimino-8-quinlolates (C1 - C8) that differ in the substitution patterns on the N-aryl group and on the quinolate unit itself. Their solid state structures will be examined using single crystal X-ray diffraction and their role as catalysts for the ROP of rac-lactide thoroughly investigated. The Na-O bond lengths range from 2.269(2) to 2.543(3) Å, which fall within the normal range found in sodium aryloxide compounds.[5,11,12] The Na-Nquino bond lengths range from 2.352(3) to 2.408(3) Å, and are noticeably shorter than that
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