Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 44, Pages 15457-15460Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja5080757
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Funding
- National Institutes of Health [R01GM111480]
- Center for Integrated Research Computing at the University of Rochester
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While iron-catalyzed Kumada cross-coupling reactions with simple iron salts have been known since the early 1970s, the nature of the in situ-formed iron species remains elusive. Herein, we report the synthesis of the homoleptic tetralkyliron(III) ferrate complex [MgCl(THF)(5)][FeMe4] from the reaction of FeCl3 with MeMgBr in THF. Upon warming, this distorted square-planar S = (3)/(2) species converts to the S = (1)/(2) species originally observed by Kochi and co-workers with concomitant formation of ethane, consistent with its intermediacy in the reduction pathway of FeCl3 to generate the reduced iron species involved in catalysis.
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