Diverse coordinative zinc complexes containing amido-pyridinate ligands: Structural and catalytic studies
Frontiers in Chemistry, ISSN: 2296-2646, Vol: 7, Issue: JAN, Page: 615
2019
- 10Citations
- 13Captures
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Article Description
In this work, zinc complexes containing amidopyridinate ligands substituted with different pendant arms have been described. Treatment of ligand precursors with ZnEt2 at a 1:1 ratio in THF yields zinc ethyl complexes (PyNC1Py)(ZnEt) (1) and (PyNC2NMe2)(ZnEt) (2), respectively. Complexes 1 and 2 show the same geometry as a distorted tetrahedron, but adopt different coordination behaviors supported by the ligands. Complex 1 represents a rare and a non-centrosymmetric mode, which the amido group bridges two zinc centers to form a six-membered ring. However, complex 2 shows a centrosymmetric mode, which the pyridine group links to the zinc centers to form an eight-membered ring. Recrystallization of complex 2 gives an additional complex (PyNC2NMe2)Zn(μ-O) (3). We attempted to prepare zinc benzyl oxide complexes but afforded only a self-assembly cubane complex ZnEt(OBn) (4). All molecular structures 1-4 are characterized depending on both single-crystal X-ray and spectroscopic data. Furthermore, their catalytic properties toward the ring opening polymerization of ε-caprolactone and L-lactide, using benzyl alcohol as the initiation reagent, are under investigation.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85061193308&origin=inward; http://dx.doi.org/10.3389/fchem.2018.00615; http://www.ncbi.nlm.nih.gov/pubmed/30662891; https://www.frontiersin.org/article/10.3389/fchem.2018.00615/full; https://dx.doi.org/10.3389/fchem.2018.00615; https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00615/full
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