Journal
CHEMICAL SCIENCE
Volume 10, Issue 21, Pages 5539-5545Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc00561g
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Funding
- NIH [1R01GM111486-01A1]
- NIH NIGMS [F32GM126635]
- NSF [CHE 1625543]
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Geometrically flexible 9-borabicyclo[3.3.1]nonyl units within the secondary coordination sphere enable isolation of high-spin Fe(ii)-dihydrides stabilized by boron-hydride interactions and a rare example of an isolable S = 3/2 reduction product. The borane-capped Fe(ii)-dihydride: (1) rapidly deprotonates E-H (E = N, O, P, S) bonds to afford borane-stabilized Fe adducts and (2) releases H-2 upon exposure to pi-acids. The Lewis acids provide an avenue for redox-leveling in analogy to the near constant operating potential for N-2 reduction in nitrogenase.
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