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Pendent Relay Enhances H 2 O 2 Selectivity during Dioxygen Reduction Mediated by Bipyridine-Based Co–N 2 O 2 Complexes

https://doi.org/10.1021/jacs.1c03381

Nichols, Asa W. ; Cook, Emma N. ; Gan, Yunqiao J. ; Miedaner, Peter R. ; Dressel, Julia M. ; Dickie, Diane A. ; Shafaat, Hannah S. ; Machan, Charles W. ( August 2021 , Journal of the American Chemical Society)

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Mechanistic insight into initiation and regioselectivity in the copolymerization of epoxides and anhydrides by Al complexes

https://doi.org/10.1039/D0CC05652A

Popowski, Yanay ; Moreno, Juan J. ; Nichols, Asa W. ; Hooe, Shelby L. ; Bouchey, Caitlin J. ; Rath, Nigam P. ; Machan, Charles W. ; Tolman, William B. ( November 2020 , Chemical Communications)
null (Ed.)
Pentacoordinate Al catalysts comprising bipyridine (bpy) and phenanthroline (phen) backbones were synthesized and their catalytic activity in epoxide/anhydride copolymerization was investigated and compared to ( t-Bu salph)AlCl. Stoichiometric reactions of tricyclic anhydrides with Al alkoxide complexes produced ring-opened products that were characterized by NMR spectroscopy, mass spectrometry, and X-ray crystallography, revealing key regio- and stereochemical aspects.
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