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. Author manuscript; available in PMC: 2018 May 23.
Published in final edited form as: J Am Chem Soc. 2017 Apr 17;139(16):5952–5956. doi: 10.1021/jacs.7b01982

Figure 1.

Figure 1

FeMo–co active site with proposed interactions of acidic groups (left); conceptual framework of the current study illustrating the use of Lewis acids to test the push–pull hypothesis (right). Filled orbitals shown in green.