Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 2, Pages 534-537Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja307714m
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Funding
- NIH [GM 070757]
- Gordon and Betty Moore Foundation
- NSF via a GRFP award
- Swiss National Science Foundation
- Office of Biological and Environmental Research
- NIH, NIGMS [P41GM103393]
- NCRR [P41RR001209]
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Tris(phosphine)borane ligated Fe(I) centers featuring N2H4, NH3, NH2, and OH ligands are described. Conversion of Fe-NH2 to Fe-NH3+ by the addition of acid, and subsequent reductive release of NH3 to generate Fe-N-2, is demonstrated. This sequence models the final steps of proposed Fe-mediated nitrogen fixation pathways. The five-coordinate trigonal bipyramidal complexes described are unusual in that they adopt S = 3/2 ground states and are prepared from a four-coordinate, S = 3/2 trigonal pyramidal precursor.
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